View of salt farms in Yangkou Township, east China

Aerial photo taken on Dec. 1, 2021 shows a view of the salt farms in Yangkou Township, Shouguang City of east China's Shandong Province. (Xinhua/Zhu Zheng)

Aerial photo taken on Dec. 1, 2021 shows a view of the salt farms in Yangkou Township, Shouguang City of east China's Shandong Province. (Xinhua/Zhu Zheng)

Aerial photo taken on Dec. 1, 2021 shows a view of the salt farms in Yangkou Township, Shouguang City of east China's Shandong Province. (Xinhua/Zhu Zheng)

Aerial photo taken on Dec. 1, 2021 shows a view of the salt farms in Yangkou Township, Shouguang City of east China's Shandong Province. (Xinhua/Zhu Zheng)

Aerial photo taken on Dec. 1, 2021 shows a view of the salt farms in Yangkou Township, Shouguang City of east China's Shandong Province. (Xinhua/Zhu Zheng)