单双倍投法简介：And because Qin Fen made a huge contribution, all the money he got from mining was his own, and he didn't have to hand it over, but he could only dig it himself. This was why Qin Fen stayed deep in the mine and didn't leave.
And because Qin Fen made a huge contribution, all the money he got from mining was his own, and he didn't have to hand it over, but he could only dig it himself. This was why Qin Fen stayed deep in the mine and didn't leave.
