Yanfen Cheng, doctoral supervisor, received her Ph.D. degree in animal nutrition and feed science from Nanjing Agricultural University in 2008. She has worked in animal nutrition and feed science for 10 years. She specializes in ruminant nutrition, fiber-degrading enzymes, and feed preconditioning. She serves as executive director of the Animal Nutrition Branch of the Chinese Animal Husbandry and Veterinary Society.