Qi Changcao. Official website, Chenjiatun Hotpot Chicken Shop in Beichen District, Tianjin, inquired that the owner of Chenjiatun Hotpot Chicken in Tianjin is Qi Changcao. Tianjin, also known as Jingu and Jinmen, is a provincial-level administrative region, municipality directly under the Central Government, national central city and mega-city of People's Republic of China (PRC), and is the economic center of the Bohai Rim region determined by the State Council.