Why is the nickname of the giant panda "Gungun"?

Who was the first to tell the giant panda to "roll"? This question is difficult to answer. But why is it called "roll"? We can still explain the reason briefly. Giant pandas are naive, cute and naughty. After eating and drinking enough, their favorite sport is rolling. If anyone hasn't seen the panda rolling, he must have seen the cartoon propaganda film of the Olympic Fuwa, in which the picture of the panda rolling down a hillside covered with bamboo must be memorable. So it can be said that it is very, very appropriate to call it "rolling". Referring to "Gungun", we can carry forward our unparalleled BT spirit and give other animals nicknames. For example, the elephant is called "Juanjuan", the pig is called "Gong Gong", the mouse is called "drill" and the chicken is called "plane" ...