Complex sentence: In the 1920's, the then Chancellor of Beijing University, Cai Yuanpei, stopped in Nanjing to visit Ouyang and to ask him to recommend someone to teach Buddhist Logic (yinming xue) at the Philosophy Department at Beijing University.
Split into simpler sentences: In the 1920's, the then Chancellor of Beijing University, Cai Yuanpei, stopped in Nanjing to visit Ouyang. Cai asked Ouyang to recommend someone to teach Buddhist Logic (yinming xue) at the Philosophy Department at Beijing University.