I think we are very capable of defending our country we dont need chinese support.
I do not doubt Pak's capability to certain decent degree. However, during a war, all kinds of unexpected could happen. In early 50s, N. Korean never thought it needed any help. But when stuff happens, it happens. Of course, Pak has deeper strategic depth and more population than Korea. Yet, geographically both have similar shape. Moreover, the N. Korean then was probably more unified than the Pakistani now due to N. Korea's communist system.
War is a complex combination of various factors, many of which are very difficult to predict. Wise strategists always think beyond ordinary thinking, and always expect the unexpected.