This is Qarhan Salt Lake, the biggest of its kind in northwest China's Qinghai Province. Its stunning emerald‑green waters draw crowds of tourists every year. But beneath the breathtaking views lies vast mineral wealth. Workers extract potash for fertilizer production and lithium for new‑energy industries from the lake's brine. Here, industrial production and sightseeing go hand in hand. The natural wonder supports both local tourism and China's supply of key resources.