红孩儿是牛魔王的孩子，却不认悟空这个牛魔王的拜把兄弟，非要吃唐僧肉不可，他会喷出三昧真火，连孙悟空都对付不了。还是观音菩萨施展法术，降服了红孩儿，收他做了善财童子。

Red Boy is the child of Bull Demon King, yet he doesn't recognize Sun Wukong as his sworn brother, the Bull Demon King. He insists on consuming Tang Monk's flesh and can spew the Samadhi True Fire, which even Sun Wukong cannot handle. It took Guanyin Bodhisattva's magic to subdue Red Boy and make him the disciple named Skilful Wealthy Child.