三期必出一期的原理是啥简介：Because only when the roads are open and material resources are continuous, people will be willing to migrate to Liaodong. At the same time, they can gain a foothold in Liaodong and reproduce their descendants.
Because only when the roads are open and material resources are continuous, people will be willing to migrate to Liaodong. At the same time, they can gain a foothold in Liaodong and reproduce their descendants.
