I think you have the bull by the udder. I think the sovereign risk is less than people fear. While Myanmar may have problems in some parts you can bet the one belt/one road is being very well looked after.
Even if what you say is true (and it's obviously not as no government can control expat press) the government makes the largest sum of money out of this mine development. China wants the concentrate. It's sitting on the one belt one road. The ore is already there, it doesn't have to be found. The current broker valuations are not including any exploration upside.