For 10 years, the panda rescue team of Chengdu Zoo has cared for injured sick or starving wild pandas. Most of them have recovered. In 1978, the Zoo began panda breeding studies and in 1980, the first artificial insemination of a panda succeeded. Since then, the Zoo has used artificial insemination in 47 cases with considerable success, thus helping to ensure the survival of an endangered species. The Chengdu Zoo is the world's leading centre for panda study and care.