On the Change of the Communication Between Ming Dynasty and Korea Dynasty

The communication between Ming dynasty and Goli dynasty and Korea dynasty on the Korea peninsula varied very much,from by sea to by land,to both by sea and by land at the same time,till by land completely since Hong Wu twenty years.This is a process,which was influenced by bilateral relationship.Since Zheng Tong,the two parties made a lot of negotations about whether the route along East eight post should be changed or not,east eight post by Ming dynasty.\;