However, Wu may have been among a wave of recalls of Chinese academics working in the West following Chiang Kai-shek's ouster from the mainland in 1949, according to eyewitness testimony by Marcel Berger, as he disappeared from France one day, without saying a word to anyone.
Wu's fate may have been linked to a broader exodus of Chinese intellectuals working in the West after Chiang Kai-shek's ouster from power on the mainland in 1949, as described by Marcel Berger's testimony, which noted his sudden and unexplained disappearance from France.