To develop minerals in Thailand, there must be Thai shareholders, accounting for "60%". In addition, the community power in Thailand is too strong to develop mineral resources. For example, your competitors spend a little money and invite the masses to make trouble. There are many such things, such as so-called NGOs, environmental protection and so on.
If it is a powerful company, the internal stocks before listing may make a lot of money after listing in the future. If it has been listed, there will be a range for the stock to rise again.
Personally, if the company is real, standardized and suitable, you can buy some.
I saw a similar company in He Xun with the same name. It should be pyramid schemes. You should be careful.
(Note: My friend just finished reading the Guide to Investment in Mineral Resources Exploration and Development in Thailand, which is of course official.)