Giant pandas Cheng Jiu and Shuang Hao were on a flight from Hangzhou to their hometown for pairing and reproduction at Chengdu Research Base of Giant Panda Breeding, October 10, 2019. /VCG Photo

They have lived at Hangzhou Zoo in the capital city of east China's Zhejiang Province for the past three years. /VCG Photo

A breakfast was prepared for the panda brothers before departing, including bamboo leaves, bamboo shoots and apples. Snacks were also taken into consideration as they are not allowed to have anything after boarding. /VCG Photo

Hangzhou Zoo was established in 1958 and will have its panda house renovated to welcome the next wave of panda residents. /VCG Photo