The Xi River is the western tributary

Tributary

A tributary or affluent is a stream or river that flows into a main stem river or a lake. A tributary does not flow directly into a sea or ocean...

 of the Pearl River

Pearl River (China)

The Pearl River or less commonly, the "Guangdong River" or "Canton River" etc., , is an extensive river system in southern China. The name Pearl River is usually used as a catchment term to refer to the watersheds of the Xi Jiang , the Bei Jiang , and the Dong Jiang...

 in China

People's Republic of China

China , officially the People's Republic of China , is the most populous country in the world, with over 1.3 billion citizens. Located in East Asia, the country covers approximately 9.6 million square kilometres...

. It is formed by the confluence of the Gui

Gui River

The Gui River is a river in the Guangxi Zhuang Autonomous Region of China, and a tributary of the Xi Jiang....

 and Xun

Xun River

The Xun River is the name of a short section of the main branch of the Pearl River system upstream from the Xi Jiang in China. Although less than 150 km long, it is of considerable importance in Guangxi Province as it drains the majority of the province...

 Rivers in Wuzhou

Wuzhou

Wuzhou , historically known as Wuchow, is a prefecture-level city in China's Guangxi Zhuang Autonomous Region.-Geography and climate:Wuzhou is located in eastern Guangxi bordering Guangdong province. It is at the confluence of the Gui River and the Xun River where they form the Xi River; 85% of all...

, Guangxi

Guangxi

Guangxi, formerly romanized Kwangsi, is a province of southern China along its border with Vietnam. In 1958, it became the Guangxi Zhuang Autonomous Region of the People's Republic of China, a region with special privileges created specifically for the Zhuang people.Guangxi's location, in...

. It then flows east through Guangdong

Guangdong

Guangdong is a province on the South China Sea coast of the People's Republic of China. The province was previously often written with the alternative English name Kwangtung Province...

, and enters the Pearl River Delta

Pearl River Delta

The Pearl River Delta , Zhujiang Delta or Zhusanjiao in Guangdong province, People's Republic of China is the low-lying area surrounding the Pearl River estuary where the Pearl River flows into the South China Sea...

 just east of the Lingyang Gorge in Zhaoqing

Zhaoqing

Zhaoqing is a prefecture-level city of Guangdong province in southern China.-Geography:Zhaoqing is located 110 km northwest of Guangzhou, in the west Pearl River Delta. It lies on the north shores of the Xijiang River, which is flows from west to east, and opposite of Gaoyao...

. The main branch of the Xi flows southeast through the delta entering the South China Sea

South China Sea

The South China Sea is a marginal sea that is part of the Pacific Ocean, encompassing an area from the Singapore and Malacca Straits to the Strait of Taiwan of around...

 at Modao Men, just west of Macau

Macau

Macau , also spelled Macao , is, along with Hong Kong, one of the two special administrative regions of the People's Republic of China...

. The major cities along the Xi include Wuzhou, Zhaoqing, and Jiangmen

Jiangmen

Jiangmen , is a prefecture-level city in Guangdong province in southern China with a population of about 4.48 million in 2010. The 3 urban districts are now part of Guangzhou - Shenzhen built up area.-Names:...

. The other two main tributaries of Pearl River are the Dongjiang River

Dongjiang River

The Dong River is the eastern tributary of the Pearl River in Guangdong province, southern China. The other two main tributaries of Pearl River are Xijiang River and Beijiang River....

 and Beijiang River

Beijiang River

Bei River is the northern tributary of the Pearl River in southern China. The other two main tributaries of the Pearl River are the Xijiang River and the Dongjiang River....

. The Xi River is navigable for its entire length. The Xi River is a commercial waterway of southern China, and links the delta cities to the interior. The entire Xi River system is the largest of the Pearl's tributaries, being 2,197 km, and its volume of flow is second in China only to that of the Yangtze River

Yangtze River

The Yangtze, Yangzi or Cháng Jiāng is the longest river in Asia, and the third-longest in the world. It flows for from the glaciers on the Tibetan Plateau in Qinghai eastward across southwest, central and eastern China before emptying into the East China Sea at Shanghai. It is also one of the...

. Other transliterations include Hsi River and Hsi Chiang. It supplies water to many places in Guangxi, Guangdong and Macau.

Another Xi is a minor tributary of the Jiulong River

Jiulong River

The Jiulong River or Jiulong Jiang is the largest river in southern Fujian, and the second largest in the province. Like all Fujian rivers but one, it flows into the Taiwan Strait....

 northwest of Xiamen

Xiamen

Xiamen , also known as Amoy , is a major city on the southeast coast of the People's Republic of China. It is administered as a sub-provincial city of Fujian province with an area of and population of 3.53 million...

.

Xi River system

Xijiang river system (italics referring to the river lies outside Guangxi Guangxi Guangxi, formerly romanized Kwangsi, is a province of southern China along its border with Vietnam. In 1958, it became the Guangxi Zhuang Autonomous Region of the People's Republic of China, a region with special privileges created specifically for the Zhuang people.Guangxi's location, in... )
			He (贺江)	Xi (西江)
		Li (漓江)	Gui Gui River The Gui River is a river in the Guangxi Zhuang Autonomous Region of China, and a tributary of the Xi Jiang....  (桂江)
Beipan River Beipan River Beipan River is a river in the Guizhou province, China, and part of the great Pearl River basin.-Other names:The upper reaches in Yunnan and Guizhou were once known as the Zangke River.-Course:... (北盘江)	Hongshui Hongshui River The Hongshui River is a major river in the Guangxi Zhuang Autonomous Region in Southern China. It is one of the main rivers in the basin of the Xi River, which in its turn is one of the main tributaries of the Pearl River....  (红水河)	Qian Qianjiang River The Qian River is a river of China. It join the Yu River at Guiping and flows into the South China Sea....  (黔江)	Xun Xun River The Xun River is the name of a short section of the main branch of the Pearl River system upstream from the Xi Jiang in China. Although less than 150 km long, it is of considerable importance in Guangxi Province as it drains the majority of the province...  (浔江)
Nanpan River Nanpan River The Nanpan River has its source in the Yungui Plateau of eastern Yunnan Province. It then flows east, forming part of the border between Guizhou and Guangxi provinces. It joins with the Beipan River to become the Hongshui River....  (南盘江)
Rong (融江)	Liu Liu River The Liu River is a tributary within the Pearl River system in Guangxi, China. It is formed by the confluence of the Rong and Long rivers in Fengshan. It flows south through Liuzhou and is joined by the Luoqing Jiang to the south. It meets the larger Hongshui He east of Laibin where it becomes...  (柳江)
Long (龙江)
You (右江)	Yong Yong river The Yong River is one of the main rivers in China, located in Ningbo, Zhejiang Province.The name, Yong, comes from the city it flows through, Ningbo, which was also known as Yong in ancient times....  (邕江)	Yu Yu River The Yu River is a river in the south of China. It rises in two branches - the Zuo River and the You River . The You flows roughly south-east from its source close to Bose in Guangxi. The Zuo flows north-east from its sources in Vietnam: Peng River and Kỳ Cùng River...  (郁江)
Zuo (左江)