The fourth question. In the fourth issue of the second season of "Run", there is a competition between the men's running team and the world famous school students to answer questions. When faced with a super complicated Olympic math problem, Jerry Lee directly said "I don't want to play", while Michael Chen, Deng Chao, Ryan and Lu Han simply gave up the answer. However, He Youjun, the master of MIT, stood straight in front of the screen and soon solved the answer to the question. Michael Chen said he didn't understand the problem, but he actually figured it out, which shows how powerful He Youjun's super brain is.