Colonel Sun Liang-tan is a fictional character and primary antagonist from the James Bond novel Colonel Sun. The character of Colonel Tan-Gun Moon in Die Another Day is acknowledged to have been very loosely based on the character of Colonel Sun; the name of the character being a tip of the hat to Amis' character.
The main villain of the novel is Colonel Sun Liang-tan. Sun is a member of the Special Activities Committee of the Chinese People's Liberation Army as well as a sadist and skilled torturer. Sun takes a perverse pleasure in inflicting all sorts of pain upon 007 in the belief that “through cruelty one rises to heights of superhuman awareness”. Raymond Benson called him "very worthy of inclusion in the Bond saga".
- In the comic strip adaptation of the novel, Colonel Sun is said to have been a member of SPECTRE.