四个数字三中三多少组

简介：Of course, there was a reason why the Ming Dynasty only closed the country to the outside world. In the early stage, it was to guard against Zhang Shicheng's remnants, and in the middle stage, it was to guard against the Japanese pirates along the coast. Over time, it formed a policy of isolation from the country. Another reason is that the Ming Dynasty had a kind of celestial empire that disdained to interact with the country. The pride of world civilization exchanges.