 Wang 's tale portrays Zhou as an aging itinerant swordmaster with " a fame reverberating like thunder " throughout the underworld society of Jianghu . He is made the sworn brother of the outlaw " Flowery Monk " Lu Zhishen , a military officer @-@ turned @-@ fighting monk , who is , according to Hsia , first among the most popular protagonists of the Water Margin . He is also given the nickname " Iron Arm " ( 铁臂膀 ) , which carried over into the title of his fictional biography Iron Arm , Golden Sabre . While the tale fails to explain the reason for the moniker , it does mention Zhou 's ability to direct his qi to any part of his body to make it hard enough to overpower the " Iron shirt " technique of another martial artist . Furthermore , Zhou shares the same nickname with Cai Fu , an executioner @-@ turned @-@ outlaw known for his ease in wielding a heavy sword . 
 Wang <a href='null_genetive' title='1'><mark>'s</mark></a>tale portrays Zhou as an aging itinerant swordmaster with " a fame reverberating like thunder " throughout the underworld society of Jianghu . He is made the sworn brother of the outlaw " Flowery Monk " Lu Zhishen , a military officer @-@ turned @-@ fighting monk , <a href='null_relcl' title='2'><mark>who</mark></a><a href='drop_aux' title='3'><mark>is</mark></a>, according to Hsia , first among the most popular protagonists of the Water Margin . He is also given the nickname " Iron Arm " ( 铁臂膀 ) , which carried over into the title of his fictional biography Iron Arm , Golden Sabre . While the tale <a href='uninflect' title='4'><mark>fails</mark></a> to explain the reason for the moniker , it <a href='uninflect' title='5'><mark>does</mark></a> mention Zhou <a href='null_genetive' title='6'><mark>'s</mark></a>ability to direct his qi to any part of his body to make it hard enough to overpower the " Iron shirt " technique of another martial artist . Furthermore , Zhou <a href='uninflect' title='7'><mark>shares</mark></a> the same nickname with Cai Fu , an executioner @-@ turned @-@ outlaw known for his ease in wielding a heavy sword . 
Wang  tale portrays Zhou as an aging itinerant swordmaster w/ " a fame reverberating like thunder " throughout the underworld society of Jianghu . He is made da sworn brother of tdaoutlaw " Flowery Monk " Lu Zhishen , a military officer @-@ turned @-@ fightin monk , , according to Hsia , first among the most popular protagonists of the Water Margin . He is also given the nickname " Iron Arm " ( 铁臂膀 ) , which carried over into thdaitle of his fictional biography Iron Arm , Golden Sabre . While thedale fail to explain the dason for the mdaker , it do mention Zhou  ability to direct his qi to any part of his body to make it hard enough to overpower the " dan shirt " technique of anotha martial artist . Furthermore , Zhou share the same nickname wiw/ai Fu , an executioner @-@ turned @-@ outlaw known fir his ease in wielding a heavy sword .