The Changjiang River and the south area of Anhui province is the main region bred schistosomiasis. 皖江流域及其以南地区是安徽省血吸虫病害的主要区域。
There are lots of similarities between the middle and lower reaches of the Han River and Tennessee Valley in natural conditions. 湖北汉江流域中下游在自然条件上与田纳西流域有许多相似之处。