According to Baidu Encyclopedia, if you want to transfer from preschool education to animal medicine major, you need to apply to the local city and county self-study examination office with the admission ticket and course certificate, and fill in the registration form for transferring to major.
The Department of Animal Medicine, 1957 was formerly the Department of Animal Husbandry and Veterinary Medicine, and 1983 merged with the Department of Chinese Veterinary Medicine to form the Department of Chinese and Western Veterinary Medicine.