Panda twins celebrate first birthday at Chongqing Zoo

A set of panda twins celebrated their first birthday at a zoo in southwest China's Chongqing Municipality Tuesday.

Yu Bao and Yu Bei were born on July 11, 2016. The male and female siblings now weigh 28 kilograms each and are both in good health.

The zoo invited local children to join the birthday party, which included a birthday cake decorated with bamboo leaves and bamboo shoots for the pandas.

Despite the recent hot weather, the pandas celebrated in their outdoor playground, climbing trees and playing on a swing.

One year for pandas are equivalent to four years for human beings, a zoo staff member said.

Chongqing Zoo began a giant panda breeding program in 1960 and is currently home to 15 pandas.