阶梯倍投方法

简介：As the mother of a country, she was filled with fear. During the Battle of Kaifeng, although it was risky for my son to lead the army, he was under the protection of thousands of troops. But today, there are only 500 soldiers and left guards around my son. On the battlefield of gold and iron horses, 500 People are afraid that they will be smashed to pieces by the enemy in an instant.