Many people go to parks in Shanghai for exercise. One popular exercise among seniors is Che Ling (spin the bell). Other names refer to the same game can be Kong Zhu (hollow bamboo, as the tool was initially made from bamboo material) or Chinese Yo-yo (though often played with two hands instead of one hand). The simplest way is to balance the bell (yo-yo) on the string. The skilled players are able to play a lot of tricks, throwing, twisting, jumping, or even handling multi bells.