Fresh bamboo leaves were prepared for the nursing panda mothers in the pen. The giant panda is very protective when it comes to motherhood. Even during eating, they hold the cub in their arms, always vigilant against anyone approaching.

From this time on, the giant panda cubs enjoys a comfortable life in the national park. Zhenzhen is a returnee giant panda, born in 2007 at the San Diego Zoo in the United States, and returned to the Panda center in 2010. In 2015, it gave birth to twins in Bifeng Gorge, Ya'an, Sichuan.

After giving birth to the twins, a panda can only nurse one of the cubs, and the other is artificially bred. In the nursery of the center, the nursery staff become "daddies" to carry out the hard work of "taking care of the baby". As giant pandas are born premature, the development of various organs is incomplete. Consequently, defecation and feeding are all completed with the help of the nursery staff.