Duty-free. According to the animal husbandry tax exemption policy, animal husbandry companies can sell dairy cows tax-free, and only need to go to the county animal husbandry bureau to start business as required. Cows are yellow cattle with milk varieties. After highly breeding and feeding, black-and-white cows are the main cows in China. This variety was introduced from 65438 ~ 0980, cattle and sheep breeding base of Shandong Animal Husbandry Bureau, with strong adaptability, wide distribution, high milk yield and rough feeding tolerance.