It is not true that Pinduo sells jadeite on the border between China and Myanmar. There are many kinds of jade sold on the border between China and Myanmar, but the price is low and the quality is not guaranteed. You can buy it in a physical store.
I can tell you, you can't buy real goods in Pinduoduo, because there are piles of fakes there, and there are no goods at all. He said that all the fakes were fake, and you ran away after buying the business.
This is fake. This is their marketing tool. Myanmar is in chaos. Trading with them is pure fiction, just for the effect of the program, attracting everyone's attention and wanting more marketing.