Zhenhai(Chen hai) (29°57'N., 121°42'E.) (World Port Index No. 59950), about 22 miles WNW of the S entrance point of Hangzhou Wan, is a small river port located, principally, on the W side of the entrance to the river Yong Jiang. Several off lying steep sided islets, with adjacent dangerous underwater rocks, lie in the approaches while extensive areas of drying mud flats flank the entrance to the river and the mud bars which obstruct it.

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