These images are not from the more infamous famine that occurred during the Great Leap Forward.
George Silk was a LIFE Magazine staffer, working for them 30 years. He extensively covered many aspects of the second world war, at one point being even captured by the Germans, and then fortunately escaping. He was also the first photographer to document Nagasaki after the atomic bombing. Immediately after the war, he was in China recording the poor social conditions and the lack of resources and its devastating effects on the Chinese populace. (source)