Pinggui Sn placer in Guangxi was discovered and exploited as early as the Bronze Age.

“平桂”砂锡矿，早在“青铜时代”已被发现、开发利用。

youdao

Pinggui Sn placer in Guangxi was discovered and exploited as early as the Bronze Age.

“平桂”砂锡矿，早在“青铜时代”已被发现、开发利用。

youdao