风火轮

fēng huǒ lúnfenghuolun

1. (martial arts) wind-and-fire wheel, weapon used in hand-to-hand fighting
2. (Daoism) a magical pair of wheels on which one can stand to ride at great speed, used by Nezha 哪吒[Ne2 zha5]
3. (fig.) never-ending treadmill

Study it in Yanamino