滚雪球层进式阶梯倍投

简介：But this is not the end. In history, the Chinese civilization has sealed the wolf in Xu several times, strangled the stone Yanran, and driven the nomads into panic and fled north. However, due to the long distance, geographical climate, and technological limitations of the times, the Chinese Dynasty was unable to gain a foothold in Khalkha Mongolia. No matter how brilliant the results were and how prosperous the military was, they had to withdraw in the end.