Hezuo are a breed of pig from the Plateau region and are located in the Gannan Tibetan Autonomous Prefecture of Gansu Province, China. The altitude in this region is high (2600 m), and the temperature low . The pigs are out on pasture year round, and are characterized by long, coarse and dense bristles, a slow growth rate, and low prolifacy, with a litter size of 4 to 7; there are 5 pairs of teats.
- Cheng, P. (1984) Livestock breeds of China. Animal Production and Health Paper 46 (E, F, S). Publ. by FAO, Rome, 217 pp