Preface

It has been 53 years since the first volume of Acta Veterinaria et Zootechnica Sinica(Chinese Journal of Animal and Veterinary Sciences,CJAVS)was published.The Journal has earned its reputation by presenting high-level academic and instructive papers,technical reports,and achievements in Chinese,but its influence is still limited to its primary audience,in China.In recent years,international trade of animals and their products have expanded,