C324 Mining of diamonds

The entire mining area belonged to many families, and Zheng Family owned a small-scale mining area, so their production wasn't high. That small mine was the result of Zheng Family water testing. After a few years of operation, he found out that the profit was not bad, so Zheng Qianqiu had to play with bigger mines. Nowadays, the price of gold will fall, but the price of diamonds has been rising