text: Two rulers died from elixir poisoning during the Five Dynasties period (907–979) of political turmoil after the overthrow of the Tang dynasty. Zhu Wen or Emperor Taizu (r. 907–912), the founder of the Later Liang dynasty, became seriously incapacitated as a result of elixir poisoning, and fell victim to an assassination plot. Li Bian or Emperor Liezu (r. 937–943), the founder of the Southern Tang kingdom, took immortality elixirs that made him irritable and deathly ill.
  The Daoist adept Chen Tuan (d. 989) advised two emperors that they should not worry about elixirs but direct their minds to improving the state administration, Chai Rong or Emperor Shizong of Later Zhou in 956, and then Emperor Taizu of Song in 976.