Aerial photo taken on June 23, 2019 shows workers shoveling crude salt in Salt Lake in Yuncheng, north China's Shanxi Province. Salt Lake of Yuncheng, a famous inland salt lake in China, entered into the harvest season for salt. (Xinhua/Wang Feihang)

Aerial photo taken on June 23, 2019 shows workers shoveling crude salt in Salt Lake in Yuncheng, north China's Shanxi Province. Salt Lake of Yuncheng, a famous inland salt lake in China, entered into the harvest season for salt. (Xinhua/Wang Feihang)

Aerial photo taken on June 23, 2019 shows workers shoveling crude salt in Salt Lake in Yuncheng, north China's Shanxi Province. Salt Lake of Yuncheng, a famous inland salt lake in China, entered into the harvest season for salt. (Xinhua/Wang Feihang)