Zoi City or Hezuo City (ZYPY: Zoi Chongkyir; Chinese: 合作市; pinyin: Hézuò Shì) is the administrative seat of the Gannan Tibetan Autonomous Prefecture in southern Gansu province in Western China. It is home to the Hezuo Monastery and its Milarepa Tower, the Langshangmaio Temple, and a mosque. There is a breed of pig, the Hezuo Swine, from here also.