At the end of the war a cease fire line was established near the?

38th Parallelthe border between North Korea and South Korea.

Democracy and darwinism would be my answer.

The  most important advantage  of  northeast china  that  mainly contributed toward its being  the  industrialand  technological center  of the  country  in the  1970s  and  1980s  is:   its  juxtaposition with china's  most important industrial  neighbors.