Which is not the geothermal region in China? A: Tibet B: Tengchong C: Taiwan D: Qinghai

Where cannot we find the “columnar joints”? A: Fangshan in Nanjing B: Leshan in Chengdu C: Ermei Mountain in Sichuan D: Tengchong in Yunnan

Why are lots of jade shops found in Heshun? A: Local people like jade. B: Selling jade can earn lots of money C: Jade is popular in China. D: Tengchong used to the center of jade trade in China.