Introduction to Fangshan Tianchi: Fangshan Volcano was a volcano 10 million years ago. It has been weathered continuously for 10 million years, and the original crater has been eroded. There is still a low-lying area of water surrounded by basalt. The water from the basalt cracks gathers here, and people call it Fangshan Tianchi. The water in the pool is spring water from basalt fissures, which is why nature created a good water for drinking Fangshan Purple Mist Tea.