Shanghai Zoo will be the home of two male giant pandas starting on Sunday after the zoo's two female giant pandas left on Friday morning. 

Ya'er and Xing'er came from the Chengdu Research Base of Giant Panda Breeding located in Sichuan Province in southwestern China. Chengdu is the largest hub for giant pandas in the mainland. 

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The two male pandas have distinguished behaviors, according to park officials. Ya'er is described as curious and active, while Xing'er always climb trees. 

"Ya'er is a naughty boy and he liked romping with his mother in childhood, while Xing'er loves rolling around and playing in water," said Pan Xiuwen, a park official in Shanghai Zoo. 

The two giant pandas left Chengdu on Saturday and arrived in Shanghai on Sunday night. 

Predecessors

Two female giant pandas previously lived in Shanghai Zoo, namely Shuangxin and Shuangxi. The twins were born in August of 2011 and were transferred to Shanghai in 2014. 

Shuangxin and Shuangxi are already four years old, the age when giant pandas reach sexual maturity. They were sent back to Chengdu where they will be partnered with their mates to procreate. 

The twins were put on a flight to Chengdu on Friday morning after eating apples, their favorite food, and undergoing medical checkups. However, the two did not went quietly. 

"Shuangxin is a good girl and always listen to us, but she did not cooperate this time. She probably knew it was her last day here," zookeeper Tang Pinggui said.  

TagsGiant Panda, giant pandas in Chengdu, Ya'er, Xing'er, Shanghai Zoo, breeding giant pandas, Chengdu Research Base of Giant Panda Breeding, Sichuna province