A popular giant panda has unexpectedly died in a Thailand zoo - forcing China to send experts to investigate.
Chuang Chuang had been at the Chiang Mai zoo since 2003, alongside his female companion.
Failing to show any sexual interest in Lin Hui, the zoo tried various methods to boost his sex drive, including putting him on a low-carb diet, and showing videos of mating pandas.
The panda bear was taken on a loan by the Chiang Mai zoo from China since 2003.
The bear, which was 19 year old, was widely popular in Thailand because of repeated efforts by the zoo to get him to mate with his female companion.
His unexplained death caused revolt on Chinese social media, with many users accusing Thailand of not caring enough for the animal.
Giant pandas usually live only for 25 to 30 years in captivity. They classified as "vulnerable" by the International Union for Conservation of Nature.
As a way of strengthening diplomatic ties, China loans the animals to countries around the world
There's extensive reporting in China about the animals' lives overseas, and Chuang Chuang's early death has received widespread coverage in local media.
According to Chinese news agency Xinhua, an investigation will be carried out to establish the cause of death, and experts from the China Conservation and Research Centre will travel to Chiang Mai to work with their Thai counterparts.
Some social media users on China's Twitter-like platform Weibo were concerned, saying: "Thailand is not suitable for raising pandas", and "they don't treat animals as well as we think".
Others asked for the remaining female panda in Chiang Mai, Lin Hui, to be returned to China.