Complex sentence: Liu Wansu (1120--1200) was a Jin dynasty Chinese physician who observed the high frequency of fever and inflammation in serious diseases and promoted the idea of using herbs of cooling nature to treat these conditions.
Split into simpler sentences: Liu Wansu (1110--1200) was a Jin dynasty Chinese physician. He observed the high frequency of fever and inflammation in serious diseases and promoted the idea of using herbs of cooling nature to treat these conditions.