Xiechi Lake

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Xiechi Lake (Chinese: 解池), also called Yuncheng yanchi (Yuncheng Salt Lake) is the largest natural lake in Shanxi in Northern China. It is a saline lake[1] used for production of salt.

In the summertime intense light and heat cause the bacterium Dunaliella salina to produce carotenoids as a protection against free radicals, due in turn to high metabolism; this turns the salt pans brilliant shades of violet, scarlet, magenta, and emerald (see photo in reference).[2]


  1. ^ Yoshida, Tora (1993), Salt production techniques in ancient China: the Aobo tu, BRILL, p. 13, ISBN 978-90-04-09657-8
  2. ^ Ye, Yvaine (Sep 1, 2018). "Rainbow lake". New Scientist.

Coordinates: 34°58′38″N 110°59′14″E / 34.977222°N 110.987222°E / 34.977222; 110.987222