It owns a 120 - square - kilometer salt lake in Golmud , Qinghai .
Qinghai Salt Lake Potash Company Limited is the largest potash production base in China .
Qinghai Salt Lake Potash Company Limited owns a 120 - square - kilometer salt lake in Golmud , Qinghai .
Qinghai Salt Lake Potash Company Limited is the largest potash production base in China .