Pledge refers to the mobile goods, raw materials, finished products or semi-finished products in the processing industry. Such as coal, steel, pig iron, grain, chemicals, wood, etc.
If the mining right is used as a secured loan, it is a mortgage loan, because the report of the underground reserves of coal or iron ore detected by the authoritative department for your company has not been excavated and cannot be seen, so it can only be mortgaged for financing.