 There is insufficient historical evidence to support the claim he knew any skills beyond archery . Contemporary records never once mention Zhou teaching Yue boxing . Despite this , various <unk> novels and folk legends have attributed many different military and supernatural skills to Zhou . These range from mastery of the bow , double swords and Chinese spear to that of <unk> hard qigong , Chuojiao boxing and even X @-@ ray vision . Wang Shaotang 's folktale even represents him as a master of <unk> Eight Immortals boxing . 
