Why didn't Lanzhou New District choose silver?

The occupied space is small, and the urban air pollution is serious.

1. Enterprises and institutions in Baiyin occupy a small space, there is no room for further expansion, and there is no space layout for new large enterprises.

2. Silver industry is highly concentrated at the bottom of the basin, which makes it difficult to alleviate the polluted air and the urban air pollution is serious. Lanzhou New District is a national new district under the jurisdiction of Gansu Province. It is an important economic growth and development area in northwest China decided by the State Council, and it is also an important window and gateway for Gansu to open to the outside world.