HSK 3
Cǎikuàng jìshù zài búduàn jìnbù.
Mining technology is constantly advancing.
HSK 7-9
Zhège dìqū de cǎikuàng yè fēicháng fādá.
The mining industry in this region is very developed.
HSK 7-9
Fēifǎ cǎikuàng pòhuài le dāngdì de shēngtài huánjìng.
Illegal mining has damaged the local ecosystem.
