In the 1970s, China began showing giant pandas in zoos in the United States and Japan as a type of diplomacy. This happened until 1984, when China changed how this was done. Starting in 1984, China would allow zoos to keep the giant pandas for 10 years, but the zoo would have to pay China up to $1,000,000 each year. Also, the zoo would have to agree that any cubs born would belong to China.