The Yangtze river is a natural barrier to the north-east.

长江是东北方向的一道天然屏障。

《牛津词典》

Located in China, the Yangtze River is 3,917 miles long and flows into the East China Sea.

长江位于中国，全长3917英里，流入中国东海。

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And along the east coast, droughts have reduced the Yangtze River to its lowest water levels in fifty years.

而东部沿岸，大旱则使长江降到了50年来的最低水位。

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Authorities also said that no damage was observed at the massive Three Gorges Dam, located on the Yangtze River, several hundred kilometres east of the epicentre.

ECONOMIST: China

Wednesday, the Chinese Academy of Sciences said the H7N9 virus probably came from migratory birds from East Asia that mixed with domestic fowl in China's Yangtze River delta region around Shanghai.

CNN: WHO reports 5 new bird flu cases in China; total now 49