Master Chinan is Mao's mentor at the Gunpla Shingyo School. Aside from having a massive Gunpla collection, he also has a gallery of figures of female characters from different Gundam series. Master Chinan cites Murrue Ramius from Mobile Suit Gundam SEED is his favorite female character.
Chinan's knowledge of Gunpla and Martial Arts makes him a formidable opponent, as seen in the last battle when his custom Master Gundam performs a combination attack with Mr. Ral's Gouf R35, crushing several hundreds of Mocks in matter of seconds.
Mao is Chinan's student, they have a very close relationship.