Chinsha

Szechuan extends from the Wushan Mountains in the east to the Chinsha River — the upper reaches of the Yangtse — in the west.

Source: wiktionary

The Chinsha was a formidable obstacle, falling from a height above sea level of some 8,200 feet at Paan or Batang on the Szechuan-Tibet border to less than 900 feet at Yipin, where it enters the Red Basin to become the Yangtze. From beginning to end, from the headwater in Chinghai to Yipin, the Chinsha River falls by an average of about eighteen feet per mile.

Source: wiktionary

TOWARD the end of April we reached the Yunnan-Kweichow border and pretended to be making for lightly-defended Kunming. Then the Red Army suddenly turned northwest, came to Chiaochetu on the Chinsha River (the upper Yangtze) and began to cross to its north bank. The Fifth Corps was to block the enemy at the Shihpan River and hold him off until the army had completed the Chinsha crossing.

Source: wiktionary

The Yangtze River, known in Tibet as the Chinsha (Upper Yangtze), rises from these perpetual snows and begins its plunging, serpentine descent through awesome gorges before it spreads its wings and sweeps across the alluvial plains of Central China.

Source: wiktionary