3组4个数分别每组取一个数多少组

简介：The Sanhe city wall is not high, the lowest point is only 1.5 feet, but with some help, it is not a problem to attack the city wall. The slave thinks that people can be sent to the nearby countryside to collect those Han people who have not escaped, and use them as human shields and pioneers to force the city wall. They climb the city, and after they have exhausted the Ming army's energy and arrows, our army will attack the city again.