Twin cubs of South China tiger have fun at Nanchang Zoo in Nanchang, capital of East China's Jiangxi province, Aug 22, 2016. The newly born twin cubs of South China tiger in Nanchang Zoo live through the observation period smoothly recently. [Photo/Xinhua]

NANCHANG -- Twin South China tiger cubs have been born at Nanchang Zoo in East China's Jiangxi province, making the total number of the endangered species at the zoo 26.

The cubs were born on May 13 and have passed the 90 to 100 days of observation period.

"Both of the twins are male and now weigh nearly 10 kg," said Song Guoshou, a zoo veterinarian.

The mother is from Nanchang Zoo and the father is from Luoyang Zoo in Henan Province.

The indigenous Chinese tiger is listed as highly endangered by the International Union for Conservation of Nature.

As of the end of 2015, there were only 131 South China tigers worldwide, all in captivity, according to Chinese zoologists.

Nanchang Zoo is home to the highest number of South China tigers.