I want to know the answer to the following question:
Who believes that the North Koreans only appeared to fail to effective execute their withdrawal plan?
All the background I'm provided with is that "Zhou attempted to advise North Korean commanders on how to conduct a general withdrawal by using the same tactics which had allowed Chinese communist forces to successfully escape Chiang Kai-shek's Encirclement Campaigns in the 1930s, but by some accounts North Korean commanders did not utilize these tactics effectively.". Is that enough to answer the question?