It is difficult to take the self-study exam, mainly to get the certificate. If you really want to learn technology, then look for the training program of advanced skills in animal husbandry and veterinary medicine in Hebei Province jointly organized by College of Traditional Chinese Medicine of Hebei Agricultural University and Hebei Animal Husbandry Bureau. It is an institution of higher learning that specializes in teaching animal husbandry and veterinary medicine, and the state recognizes college certificates. Search their training programs yourself. Internship and employment are good.