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Li River

The Li River (Lijiang) is a scenic river in the Zhuang Autonomous Region of southern , celebrated for its stunning topography, verdant hills, and tranquil waters that have inspired poets and artists for centuries. Originating from the southern slopes of Yuechengling Mountain in the Mao'er Mountains at an elevation of about 1,732 meters, near the junction of Xing'an and Ziyuan counties, it flows southward for approximately 164 kilometers as the upper reaches of the Gui River, a of the system. The river passes through the city of and the town of Yangshuo, where its most iconic 83-kilometer stretch features dramatic peaks, caves, and groves, before merging with the Lipu and Gongcheng rivers near Pingle County to form the broader Gui River. Renowned as one of China's most picturesque waterways, the Li River's landscape exemplifies classic karst landforms shaped by millions of years of erosion, including towering peaks, deep ravines, and underground caves such as the Reed Flute Cave and Seven-Star Park. This unique geology, combined with the river's clear waters and surrounding subtropical vegetation, has earned it designations as a national key scenic spot since 1982 and one of 13 rivers under national protection in 1996, with the Guilin-Yangshuo section rated as an AAAAA-level tourist attraction. The landscape forms part of the , a inscribed in 2007 due to its outstanding natural beauty and biodiversity, hosting diverse flora and fauna amid the karst ecosystem. Historically, the Li River—known in ancient times as Guishui or Dongjiang—has been a vital artery for transportation, trade, and cultural exchange since the Qin Dynasty, when the nearby Lingqu Canal was constructed to link it with the Yangtze River basin. Its fame dates back to the Southern Song Dynasty, immortalized in the proverb "Guilin's mountains and waters are the finest under heaven," and it continues to draw millions of visitors annually for bamboo raft rides, luxury cruises, and hikes, boosting the local economy while emphasizing sustainable tourism practices. Ecologically, ongoing conservation efforts focus on pollution control and habitat restoration to preserve its pristine environment amid growing tourism pressures.

Geography

Course and Source

The Li River originates in the Mao'er Mountains of Xing'an County, in northeastern Guangxi Zhuang Autonomous Region, China, where the peak elevation reaches 2,141.5 meters above sea level. The river's source lies on the southern slopes of the Yuechengling ridge at the junction of Xing'an and Ziyuan counties, emerging at an altitude of approximately 1,732 meters within the mountain range bounded by coordinates 25°48' to 25°58'N and 110°20' to 110°35'E. This highland origin marks the beginning of the river's southward flow through karst-dominated terrain in the region. Stretching 164 kilometers in total, the Li River traverses from its headwaters in Xing'an County southward, meandering through Lingchuan and cities before reaching and ultimately converging with the Gui River at Pingle County. Along this course, it passes notable urban and scenic areas, including the city of and the town of Yangshuo, shaping the cultural and economic landscape of northeastern . The river exhibits a modest descent profile over its length, dropping from around 150 meters above near to approximately 110 meters at Yangshuo, contributing to its gentle gradient and in the lower reaches. As the upper course of the Gui River, the Li River forms an integral part of the broader Xijiang system within the basin.

Hydrology and Basin

The Li River, originating in the Mao'er Mountains of northeastern , drains a of approximately 12,285 km² before integrating into the larger Xijiang River system of the . This karst-dominated catchment captures subtropical monsoon precipitation, contributing to the river's role as a key hydrological feature in southern . The basin's integration occurs as the Li River converges with the Lipu River and Gongcheng River at Pingle County, forming the Gui River, which ultimately feeds into the network. Hydrological measurements at the gauging station indicate an average discharge of 128 m³/s, with significant seasonal variations driven by the . During the wet season (April to July), flows can surge due to intense rainfall, often leading to 2–3 major floods annually, particularly in May and June, with peak discharges exceeding 3,000 m³/s in extreme events. In contrast, dry season flows drop below 60 m³/s, reflecting reduced precipitation and higher evaporation rates in the terrain. Major tributaries, such as the Taohua River (joining near ), Liangfeng River, and Chaotian River (confluencing upstream of ), augment the main stem's flow, while the Lipu River (from the southwest) and Gongcheng River (from the east) meet at Pingle to expand the downstream channel. Upstream reservoirs, including the Qingyuntan , regulate these inflows by storing water during wet periods and releasing it to mitigate floods, thereby stabilizing flow patterns and reducing peak discharges by up to 20% in controlled scenarios. Water quality in the basin is generally high, classified under China's Class II standards for , but exhibits spatial and seasonal variations influenced by , agricultural non-point sources, and reservoir operations. Key metrics from 2012–2018 monitoring at sites like Dahe, Mopanshan, and Yangshuo show permanganate index (CODMn) averaging below 2 mg/L with a declining trend; total (TN) and (TP) levels increasing downstream due to inputs; dissolved oxygen (DO) exceeding 6.8 mg/L for 75% of the time, though dipping in reaches; and ranging from 7.0 to 8.5, indicating weakly alkaline conditions that intensify toward Yangshuo. Wet season dilution improves overall quality, while dry periods concentrate pollutants, underscoring the need for ongoing basin management. As of 2024, ongoing ecological efforts have further improved compared to previous years.

Geology and Landscape

Geological Formation

The geological foundation of the Li River valley was established during the period, approximately 419 to 358 million years ago, when the region formed part of a shallow environment within ancient seas of the Block. Thick deposits, reaching up to 3,000 meters in succession from the Upper Devonian to Lower , accumulated as cyclic peritidal strata in these tropical shelf settings, comprising the primary carbonate bedrock that underlies the area. Evidence of early dissolution features, such as palaeokarst surfaces with dissolution pits and pipes filled by sediments, indicates initial karstic processes linked to sea-level fluctuations at the Frasnian-Famennian boundary. Tectonic activity profoundly shaped these deposits through the eon, as the Block underwent multiple deformation phases, including Paleozoic collisions with adjacent cratons that caused folding of the massive limestones. Differential tectonic movements during the and further fractured the bedrock, with intermittent uplift since the early —driven by far-field stresses from the India-Eurasia collision—elevating the region and creating contrasting hydrogeological conditions that facilitated localized fracturing and structural variability. Neo-tectonic uplift in the period dissected the karst terrains, promoting the evolution of the river valley's topography. Dissolution processes, initiated in the late Paleozoic and accelerating over millions of years, have been central to the valley's geological development, as slightly acidic rainwater and allogenic river waters selectively eroded the soluble in a . This chemical , enhanced by tropical vegetation and abundant since the Permian, progressively hollowed and sculpted the fractured , transitioning from initial subterranean ification to surface maturation. The overall reflects a progression through geological epochs: deposition in the , folding and early karst in the Permian-Triassic, stability with minor , and dominant Cenozoic-Quaternary uplift and that defined the modern valley configuration.

Karst Features

The landscape of the Li River, particularly along its course through and Yangshuo in Province, , exemplifies the classic fengcong and fenglin formations typical of tropical systems. Fengcong consists of clustered conical hills rising 100–300 meters above the surrounding terrain, often interconnected and separated by deep dolines, while fenglin features isolated tower-like peaks emerging abruptly from alluvial plains, with heights ranging from 30–80 meters and occasionally up to 300 meters near transitional zones. These formations dominate the river's scenic corridor, where fengcong prevails upstream near and fenglin becomes more prominent downstream in the Yangshuo area, covering approximately equal proportions of the terrain. Key geological elements shaping this topography include soluble limestone hills derived primarily from Devonian and Carboniferous strata, which are highly susceptible to dissolution under humid conditions. Sinkholes, or dolines, are abundant in fengcong areas, forming enclosed depressions that collect surface water and facilitate underground drainage through extensive cave networks, such as the 14-kilometer Guanyan cave system along the river basin. This subterranean hydrology diverts much of the river's flow, with cave streams exhibiting discharge rates of 0.3–8.0 cubic meters per second, underscoring the integrated surface-subsurface karst dynamics. In the Yangshuo region, the fenglin towers exhibit a notable density, with representative clusters illustrating up to hundreds of peaks across limited alluvial flats, enhancing the river's dramatic vertical relief averaging 180 meters. The ongoing evolution of these features is profoundly influenced by the region's tropical-subtropical monsoon climate, characterized by annual precipitation of 1,500–2,000 millimeters and mean temperatures of 18–19°C, which accelerate chemical and mechanical . rates in the Li River average 50–120 millimeters per thousand years, driven by high rainfall intensity during the May-to-October and compounded by historical tectonic uplift. This climatic regime sustains active landscape sculpting, transitioning fengcong clusters into mature fenglin towers over geological timescales.

History

Ancient Development

The Lingqu Canal, a monumental feat of ancient , was constructed in 214 BC under the orders of , the first emperor of the , to connect the upper reaches of the in the River basin with the Li River in the basin. Designed by the engineer Shi Lu, who mobilized approximately 100,000 soldiers for the project, the canal facilitated the Qin Empire's military campaigns against the peoples in the region by providing a vital for troop and supply transport. This cross-basin linkage marked one of the earliest large-scale hydraulic projects in Chinese history, demonstrating advanced contour canal techniques that followed the natural terrain to minimize excavation. Spanning approximately 36 kilometers, the Lingqu Canal incorporated sophisticated features, including a main channel divided into northern and southern sections, with the southern portion measuring about 33 kilometers and featuring four distinct segments to navigate the hilly landscape. Key engineering elements included 36 lock gates—recognized as precursors to modern ship locks—and a series of spillways and sluices to regulate water flow and prevent flooding, enabling safe navigation for boats across varying elevations. By integrating with overland routes, the canal supported a comprehensive 2,000-kilometer waterway system that extended from to the , revolutionizing logistics. The canal played a pivotal role in ancient and , allowing the efficient movement of , troops, and between the and systems, which bolstered the Qin conquest of southern territories and later sustained economic exchanges during subsequent dynasties. This infrastructure not only secured imperial control over but also promoted regional integration by facilitating the transport of resources like timber and metals southward.

Modern Infrastructure

Following the establishment of the People's Republic of China in 1949, numerous small hydropower stations were constructed across Guangxi Province, including in the Li River basin, to harness the region's abundant water resources for electricity generation and initial flow regulation. By the late 1970s, the number of small hydropower stations nationwide had surged to nearly 90,000, with many in southern basins like the Li River contributing to local power needs and modest seasonal flow stabilization through storage and release operations. In the Li River basin specifically, the Qingshitan Reservoir, built on an upper tributary, has served as a key facility for regulating downstream flows, mitigating dry-season shortages, and supporting water supply since its operational start in the mid-20th century, with optimized operations reducing flood peaks by up to 20% during high-water events. Cruise infrastructure along the Li River began developing in the as part of China's opening to tourism, with organized boat services from to Yangshuo established to navigate the 83-kilometer scenic route through landscapes. Initial fleets consisted of basic wooden and steel-hulled vessels accommodating 50-100 passengers each, evolving by the 1990s into standardized 3- and 4-star cruises departing from Mopanshan or Zhujiang piers in , with voyages lasting about 4 hours and capacities reaching 120 seats on larger boats to handle growing visitor volumes. These routes, now operating daily, incorporate docking facilities at Yangshuo's ports for seamless transfers, enhancing river accessibility while adhering to capacity limits to preserve navigational safety. Road and bridge networks expanded significantly in the early to improve land access parallel to the river, exemplified by the 67-kilometer Guilin-Yangshuo Expressway, a build-operate-transfer project completed in 2008 that connects Municipality to via elevated sections and tunnels through terrain. This expressway, featuring multiple bridges over tributaries and the main channel, reduced travel time from over 2 hours to under 1 hour, facilitating efficient transport of goods and visitors without direct river interference. Post-2010 flood control measures have focused on resilient infrastructure to counter increasing rainfall intensity, with the Li River Comprehensive Ecological Management and Demonstration Project—initiated in 2020 and supported by the —constructing 68 kilometers of embankments along the Li River and tributaries like the Chaoyang and Liangfeng Rivers, designed for 100-year floods and incorporating 17-42% buffers for projected climate-induced flow increases. Additional enhancements include features, such as 170,000 square meters of permeable surfaces and green retention fields covering 165 hectares in areas like Yangshuo and Lingui District, which absorb excess runoff and regulate peak discharges by up to 18%. While no major new water diversion projects specific to the Li River have been implemented post-2010, upstream operations continue to support indirect diversion for regional supply, building on the enduring connectivity provided by the ancient Lingqu Canal system.

Ecology and Biodiversity

Flora and Fauna

The Li River's subtropical environment fosters a rich array of vegetation dominated by lush bamboo forests that line the riverbanks and hills, providing essential habitat and contributing to in the region's humid climate. Ferns thrive in the shaded and epiphytic niches of the landscape, with species adapted to the high humidity and soils, enhancing the area's through their role in nutrient cycling. Endemic flora, such as specialized orchids and mosses, further diversify the , uniquely suited to the rocky microhabitats formed by the river's surrounding . The riverine and habitats of the Li River support a diverse , including 185 that inhabit its clear waters and connected cave systems, many of which exhibit adaptations like reduced pigmentation for subterranean life. Notable among these are endemic cave-dwelling of the Sinocyclocheilus, such as S. guilinensis, which have evolved eyeless forms and heightened sensory capabilities to navigate the dark, oxygen-poor underground rivers linked to the Li basin. Avian life is prominent, with waterbirds such as great cormorants (Phalacrocorax carbo) and little egrets (Egretta garzetta) commonly observed diving and wading in the river's flow, utilizing the pinnacles for nesting. These species engage in seasonal migrations, with egrets moving along the river corridor during wet seasons to exploit abundant prey, while the caves harbor endemic like troglobitic millipedes and , isolated in their subterranean refugia. Recent restoration efforts as of April 2025 have led to the return of rare such as the , indicating improved habitat conditions. This assemblage underscores the Li River's role as a vital corridor for both resident and transient adapted to its dynamic aquatic and terrestrial interfaces.

Conservation Status

The Li River Scenic Area, designated a national key scenic spot in 1982, is integrated into the National Park as part of China's national park pilot program in the late 2010s. The region gained international recognition as part of the , inscribed on the World Heritage List in 2007, with the Guilin Karst component—including the Li River—added in 2014 for its outstanding examples of tower and cone formations. Additionally, the Huixian Karst Wetlands, located along the Liangfeng River (a key tributary of the Li River), was designated a Ramsar Wetland of International Importance on 28 October 2022, highlighting the area's role in supporting hydrology and . Key threats to the river's ecological health include from and agricultural activities, which introduce nutrients, organic waste, and into the waterway. contributes through boat traffic, discharge, and , while agriculture adds runoff from fertilizers and pesticides, leading to and sediment loading. Studies have detected elevated levels of such as (Mn, average 0.12 mg/L), (Zn, average 0.05 mg/L), and (As, average 0.003 mg/L) in surface waters, often exceeding natural background values and posing risks to aquatic life, though concentrations remain below national Class II surface water standards in most monitored sections. These pollutants have degraded , particularly in upstream and midstream areas near , affecting the for endemic like cave fish that rely on clear, stable river conditions. Restoration efforts have intensified since the mid-2010s to mitigate these threats and enhance . The Guangxi Li River Comprehensive Ecological Management Project, initiated in 2019 with support from the , focuses on riverbank stabilization, , and habitat rehabilitation across 10 subprojects along the basin. initiatives under China's national ecological programs, including expansions of the Grain-for-Green Project since 2015, have contributed to overall ecological improvements in the Li River Basin, with data showing enhanced vegetation health and reduced vulnerability to in over 60% of the basin as of 2020. These measures have led to measurable improvements in -based ecological indices.

Human Interactions

Tourism and Economy

The Li River serves as a cornerstone of in , attracting millions of visitors annually who seek its serene waterways and dramatic landscapes. Since recovering from the , annual visitor numbers to the area, where the Li River is the primary draw, have exceeded 100 million, with domestic tourists alone reaching approximately 139 million in 2023. This surge underscores the river's enduring appeal as a premier destination in . In 2024, in grew by nearly 15% year-on-year, continuing the recovery trend in . Key tourist activities along the Li River include the iconic 83-kilometer cruise from to Yangshuo, which originated in the 1970s and has since become a signature experience, ferrying passengers through picturesque valleys over four to five hours. Complementing the larger vessels, offers a more intimate adventure, allowing visitors to glide quietly on motorized or traditional-style rafts past rural scenes and formations, particularly popular in sections like Yangdi to Xingping. These cruises and trips, upgraded with modern amenities while preserving traditional elements, generate substantial revenues, with Guilin's overall income surpassing 170 billion RMB in 2023, of which river-based activities form a critical portion. Tourism centered on the Li River drives significant economic multipliers in the , particularly through job creation in and related sectors. The industry supports thousands of positions in hotels, guiding services, and local eateries, fostering employment growth amid Guilin's push for . Overall, makes a significant contribution to Guilin's local GDP, bolstering infrastructure and community livelihoods while leveraging the river's scenic backdrops to enhance visitor experiences. In recent years, post-COVID recovery efforts have emphasized eco-tourism promotions along the Li River, with initiatives in 2023 focusing on ecological protection and to ensure long-term viability. These developments include enhanced river basin management and low-carbon facilities, aligning tourism growth with environmental conservation to attract responsible travelers.

Cultural Significance

The Li River holds profound symbolic importance in Chinese culture, most notably depicted on the reverse side of the 20 yuan banknote introduced by the in 1999, featuring the iconic landscape near Xingping that captures the river's peaks and serene waters as a representation of the nation's natural splendor. This imagery underscores the river's status as an emblem of harmonious beauty between humanity and nature, evoking timeless ideals of in . The river has long inspired , appearing in poetry that celebrates its ethereal scenery. For instance, the poet (768–824) famously described it as "a green gauze belt" winding through "jade hairpin" mountains, encapsulating the awe-inspiring fusion of water and stone that defines verse. In modern literature, the Li River continues to serve as a muse for writers and artists, symbolizing introspection and the sublime, as seen in contemporary works that draw on its landscapes to explore themes of transience and environmental harmony. Traditional practices along the Li River further highlight its cultural depth, particularly cormorant fishing, an ancient technique dating back over a thousand years where trained dive for under lantern light at night, reflecting a symbiotic bond between humans and nature that is now recognized as a key element of southern China's . This ritualistic method, once essential for local livelihoods, embodies folklore and ingenuity, though it faces decline in the . Festivals centered on the river banks amplify its role in communal traditions, such as the Guilin Lantern Festival, held during the , where thousands of glowing lanterns are released onto the waters, symbolizing wishes for prosperity and unity while illuminating the silhouettes in a spectacle of light and reflection. These events foster cultural continuity, with efforts aiding in the preservation of such practices amid evolving lifestyles.

Notable Sites

Natural Landmarks

The Li River in Province, , is renowned for its dramatic landscapes, where soluble has been eroded over millions of years to form towering peaks, caves, and cliffs that create a surreal, otherworldly scenery. These natural landmarks, shaped by geological processes spanning hundreds of millions of years, draw visitors for their unique formations visible along the river's 83-kilometer stretch from to Yangshuo. One of the most iconic features is Elephant Trunk Hill, a pinnacle located at the confluence of the Li River and the Taohua (Peach Blossom) River in city. Rising 55 meters above the water, this 108-meter-long and 100-meter-wide formation resembles a massive elephant extending its trunk to drink from the river, earning it the status as Guilin's official symbol. The hill, dating back approximately 360 million years to the period, features the Water Moon Cave arching through its base like an elephant's eye, offering panoramic views of the surrounding peaks and waters. Further enhancing the river's subterranean wonders is the Reed Flute Cave, a natural cavern situated about 5 kilometers northwest of in the Guangming Mountains. Stretching approximately 240 meters long, with a tour route of about 500 meters and a maximum ceiling height of 18 meters, the cave is adorned with an array of stalactites, stalagmites, stone pillars, and curtains formed over millennia through mineral-rich water dripping and evaporation. Multicolored lighting illuminates these formations, highlighting shapes that evoke mythical scenes such as crystal palaces and forest mazes, making it a prime example of the region's cave systems. Along the river's midsection near Xingping, the Nine-Horse Fresco Cliff stands as a striking natural artwork on the western bank. This 400-meter-high and 200-meter-wide cliff face bears mineral-stained rock patterns that, from certain angles, vividly resemble nine galloping horses in a dynamic , a phenomenon created by natural and of the . Visible during river cruises, the formation has inspired legends of imperial examinations where only the wise could discern all , underscoring its cultural allure rooted in geological artistry. The scenic bend near Xingping Ancient Town exemplifies the Li River's photogenic karst vistas, where the river curves gracefully between jagged peaks and lush valleys, a view immortalized on the reverse of China's 20-yuan since 1999. This S-shaped , framed by symmetrical tower karsts rising sharply from the water, captures the essence of the area's fenglin (tower) , providing one of the most photographed panoramas along the waterway.

Historical Attractions

The Lingqu Canal, constructed in 214 B.C. under Emperor of the , represents one of ancient China's most remarkable engineering feats, linking the basin to the Li River system through a 36-kilometer channel that facilitated military campaigns and in southern regions. This cross-basin waterway features innovative sluices and dikes from the Qin era, designed to regulate water flow between the and systems, and remains functional today for and , underscoring its enduring hydraulic ingenuity. As a World Heritage tentative site within the Lijiang River Scenic Zone, the canal highlights the Qin period's advanced engineering context, which transformed the Li River area into a vital corridor for trade and settlement. Seven Star Park in Guilin, established as a scenic and cultural site during the Sui (581–618 C.E.) and Tang (618–907 C.E.) dynasties, encompasses ancient structures that reflect the region's early Buddhist and architectural heritage along the Li River. Key features include the Flower Bridge, an arched stone structure originally built in the Song Dynasty (960–1279) and renovated in later periods, symbolizing the area's poetic landscape traditions. The park's Seven Star Cave contains stone carvings and inscriptions dating to the Tang Dynasty, with over 250 etchings that illustrate historical pilgrimages and artistic expressions tied to the nearby Li River. These elements, integrated into the urban fabric of Guilin, have drawn visitors since the Tang era, preserving a blend of natural karst formations and human-crafted relics. Folded Brocade Hill, located on the western bank of the Li River in northern , features restored pavilions that offer elevated vantage points and embody centuries of imperial landscaping. The Wind Cave within the hill houses nearly 100 images and over 200 stone carvings from the (618–907) and (960–1279) dynasties, evidencing its role as a spiritual site during these periods. Prominent structures include the Folded Brocade Pavilion on Bright Moon Peak and the Cloud-Catching Pavilion, which provide panoramic views of the Li River and surrounding , with some pavilions tracing origins to the era through associated inscriptions and rebuilds. These pavilions, enhanced by Song-era artistic contributions in the caves, highlight the hill's historical function as a contemplative overlook integrated with the river's flow. Yangshuo's West Street, with origins dating back over 1,400 years to the (581–618 C.E.), began as a vital trading post along ancient routes, facilitating commerce in goods like , , and near the Li River. Positioned at the of river trade paths, the 500-meter pedestrian street evolved from a local market hub in imperial times to a culturally diverse center by the , incorporating bilingual signage and international influences while retaining its cobblestone layout and . This transformation preserved its role as a nexus for regional exchange, directly linked to the Li River's navigational importance for transporting commodities upstream from Yangshuo.

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