the upstream of Yangtze River的用法和样例：
例句
- An economic centre in the upper reaches of Yangtze River, a new Chongqing, is striding towards the world with development!
一个长江上游经济中心的新重庆正在开发中走向世界！ - Similar sediment pollution scenarios are occurring in the headwaters of the Salween and Yangtze Rivers.
在萨尔温江和长江上游也存在类似的泥沙污染状况。
