Tai Chi chuan and neidan integration: The 3 Gates By Home › Forum Online Discussion › Practice › Tai Chi chuan and neidan integration: The 3 Gates This topic has 0 replies, 1 voice, and was last updated 7 years ago by Michael Winn. Viewing 1 post (of 1 total) Author Posts December 6, 2017 at 4:58 am #51460 Michael Winn On neidan in T’ai Chi Ch’uan and the psychology behind Opening of the Three Gates (通三關 Tōng Sān Guān) This is a very basic descriptioin of neidan, but useful in its simplicity for tai chi adepts. Author Posts You must be logged in to reply to this topic.