Chuangchuang, the giant panda, is a male panda. In 2005, she married Hui Lin, a female giant panda. From then on, Chuang Chuang was too fat to mate. Later, with the joint efforts of Chinese and Thai scientists and breeders, in 2009, two giant pandas finally gave birth to a child, Lin Bing. There is no record of giant pandas losing weight.

It is reported that giant panda Chuangchuang and Lin Hui went to Chiang Mai Zoo in Thailand in 2003 to carry out scientific research cooperation. The arrival of two giant pandas has been loved and concerned by the Thai people and brought them joy. China and Thailand have always maintained close ties in giant panda cooperation. During their stay in Thailand, China regularly sent experts to Chiang Mai Zoo to assist in the breeding and management of the two pandas, and to check their health. Thailand will also regularly submit monthly reports on two giant pandas to China. In May 2009, with the joint efforts of China and Thailand, two giant pandas gave birth to a cub, Lin Bing.

The reason why giant pandas are on the verge of extinction is related to their reproductive difficulties. In captivity, the female giant panda is about 4 years old, and the male giant panda enters sexual maturity at about 6 years old. Female giant pandas are in estrus once a year, only for a short period of 2-3 days, and the estrus period is usually in March-May every year. If the male panda doesn't take action at this time, it will have to wait for another year.

In addition, giant pandas are very picky and only want to mate when they really get along with their partners. This rarely happens. Captivity is also one of the reasons why the mating rate of giant pandas is so low. The director of a research center in Sichuan province said that less than 5% of captive male giant pandas can mate naturally. Some researchers also said that female pandas in captivity often cannot enter estrus normally. In order to solve this problem, Chinese scientists have reformed the living environment of captive giant pandas to simulate the living environment in the wild more truly, thus stimulating the sexual desire of giant pandas.

The researchers also found that because of too little mating, giant pandas rarely have the opportunity to witness similar mating behavior, which leads them to know almost nothing about how to mate. In order to provide guidance for giant pandas, scientists took measures to show them the "Panda Adult Movie", which was also popular on the Internet for some time.