Xiao Xiao, a female Francois' langur monkey, met the public with her pair of mixed-sex twins at Chimelong Safari Park in Guangzhou, south China's Guangdong province, on May 13, 2018.

The new mother gave birth to the world’s first mixed-sex Francois' langur twins last month. The twins were born with bright orange fur, which will turn black like their mother’s within two to three months.

The Francois' langur monkey is one of China's most endangered wild animals, and is noted as an endangered species on the International Union for Conservation of Nature's red list.

The species are found in China's Guangxi, Guizhou, Chongqing and Sichuan provinces, as well as the northeastern mountain areas of Vietnam.