阶梯倍投方案1,2,2,4,4

简介：Things in Liuzhou have come to an end, but Su Can is not in a hurry to go home. After all, the summer vacation is so long. Originally, the family said that he came out to relax, so when he came out this time, he planned to go out for a walk. Take a look at the prosperous and colorful world.