From west to east they are:
Irrawaddy River
Salween River
Chao Phraya River
Mekong River
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Red River
The following is a brief introduction to these sums:
The Irrawaddy River is one of the largest rivers in the Indochina Peninsula of Asia and the largest river in Myanmar. In ancient China, they were called the Great Jinsha River and Lishui. It has two river sources: the east source is called the Enmeikai River, which originates from the southern foot of Bosula Mountain in Zayu County, China (it is called the Dulong River in Yunnan, China), and the west source, the Mailikai River, originates in Myanmar. Northern mountainous area. The Dulong River flows in the southeast through the western border of the Dulong and Nu Autonomous County in Gongshan, Yunnan, then turns southwest and enters Myanmar, passing through the Jiagannan River, and is called the Enmeikai River. The two rivers meet at Guidao, about 50 kilometers north of Myitkyina City. Later it was called the Irrawaddy River. The river has a total length of 2,714 kilometers and a drainage area of ??430,000 square kilometers. The entire basin is bounded by the western mountains and the Shan State Plateau, and is in the form of a long north-south strip. The mouth section is a fan-shaped delta (30,000 square kilometers).
Salween, also known as Nu Chiang or Nu Jiang in China. The upper reaches of the river are called Nagqu River in Tibetan. Because the water is deep and dark, China's earliest geographical work "Yu Gong" called it the Black Water River. The Nu River is called Anu Rimei among the local Nu people. "Anu" is the name of the Nu people. "Rimei" is translated as river in Chinese. "Anu Rimei" is the river in the area where the Nu people live. Therefore Named Nujiang.
The Chao Phraya River (Menam River), also called Chao Phraya River in Thailand, originates from the mountains in northern Thailand, flows to the flat areas in the south, forming the Chao Phraya River Delta, and finally flows into the Bay of Bangkok, with a total length of 1,352 kilometers. , with a basin area of ??170,000 square kilometers. Bangkok, the capital of Thailand, is located at the mouth of the Chao Phraya River. The Chao Phraya River is the largest river in Thailand, running through the entire territory of Thailand from north to south.
The Mekong River, with a total length of 4,880 kilometers, is the most important transnational water system in Asia and the sixth largest river in the world; its main source is Zaqu, which originates from Zaduo County, Yushu Tibetan Autonomous Prefecture, Qinghai Province, China . It flows through China, Laos, Myanmar, Thailand, Cambodia and Vietnam, and flows into the South China Sea in Ho Chi Minh City, Vietnam. Except for China and Myanmar, all the basins are members of the Mekong River Commission. The upper reaches of the Mekong River is in China and is called the Lancang River. The lower delta is in Vietnam and is called the Jiulong River in Vietnam. The total length is 2,139 kilometers.
The Red River originates from the central part of Yunnan Province in China [also known as Yuan River·Jiahe [Yuan Chiang]], with its source at an altitude of 2,650 meters. The Lishe River in the upper reaches leaves Weishan Yi and Hui Autonomous County in the north and receives the east tributary Lvzhi River at Sanjiangkou. It is then called the Yuanjiang River. It flows into the Honghe Hani and Yi Autonomous Prefecture in my country and is called the Red River. It flows southeast to the mouth of the river and enters Vietnam. It branches into Hanoi. North Gulf of the Pacific Ocean. The total length is about 1,200 kilometers, the river length in China is 692 kilometers, and the drainage area is 38,100 square kilometers. The river valley is deep, with the watershed elevation generally ranging from 2,000 to 3,000 meters. The riverbed elevation near the river mouth is 76.4 meters. The total drop of the entire river is 2,574 meters, with an average drop of 3.9‰. There are many canyons. Li Xianjiang is the largest tributary on the west bank of Yuanjiang River. The upstream is called Balbian River. After the southeastern flow merges with Amo River, it is called Li Xianjiang. After it flows into Vietnam, it is called Heishui River. The length of the mainstream river in the country is 488 kilometers and the drainage area is more than 33,000 square kilometers. . The Panlong River is the longest tributary on the east bank of the Yuanjiang River. It flows into Vietnam from northwest to southeast and is called the Lujiang River. The length of the mainstream river in the country is 279 kilometers and the drainage area is 6,123 square kilometers. The multi-year average river runoff of Yuanjiang is 48.4 billion cubic meters. Karsts are widely distributed in limestone areas within the basin, causing serious water seepage and serious surface water shortage. The theoretical reserves of hydropower resources are 9.89 million kilowatts, and the possible development capacity is 3.6 million kilowatts. Runoff is unstable throughout the year, reaching as high as 9,500 cubic meters per second during the rainy season. The annual sand transport volume is 130 million tons. The average annual flow rate is 4688 meters/second. Because most of the river flows through the tropical red soil area, the water is mixed with red soil particles and is slightly red, hence the name Red River.