The Tongkeng-Changpo cassiterite-sulfide deposit in Guangxi, a superlarge deposit in the Dachang polymetallic tin orefield, is the key to the genetic study of the Dachang ore field.

• 铜坑_长坡锡石硫化物矿床是桂西北大厂矿田中的一个超大型矿床,由浅部的脉状矿体和中_深部的层状矿体组成。