Complex sentence: He took a post teaching in the Chinese department of Tsinghua University in 1946 and in 1952 was promoted to adjunct professor and began teaching at Peking University the same year.
Split into simpler sentences: He took a post teaching in the Chinese department of Tsinghua University in 1946 and in 1952 was promoted to adjunct professor. He began teaching at Peking University the same year.