om int ang ▁and ▁expressed ▁dis may ▁at ▁its ▁defeat ▁in ▁the ▁civil ▁war ▁against ▁Ma o ▁Z ed ong ▁in ▁ 1 9 4 9 . ▁He ▁reported ly ▁said , ▁" All ▁the ▁success ▁I ▁have ▁att ained ▁in ▁my ▁life ▁has ▁been ▁a ▁fa ç ade ; ▁al as , ▁I ▁fall ▁together ▁with ▁the ▁Ku om int ang ▁government . ▁I ▁have ▁overcome ▁all ▁challeng es , ▁bar ▁this ." ▁Z eng ▁Jun chen ▁died ▁on ▁ 6 ▁July ▁ 1 9 6 4 ▁in ▁Ch ong q ing , ▁China , ▁at ▁age ▁ 7 6 . ▁His ▁former ▁residence ▁in ▁Sh aping ba , ▁Ch ong q ing , ▁a ▁two - story ▁building ▁with ▁a ▁garden , ▁was ▁gaz ett ed ▁as ▁a ▁monument ▁by ▁the ▁local ▁government ▁in ▁May ▁ 2 0 0 6 . ▁ ▁Z eng ' s ▁estimated ▁ear nings ▁of ▁five ▁to ▁six ▁million ▁y uan ▁trad ing ▁op ium ▁made ▁him ▁one ▁of , ▁if ▁not ▁the , ▁most ▁successful ▁drug ▁bar ons ▁of ▁China ▁during ▁his ▁period . ▁Li ▁X ia ox ion g ▁writes ▁in ▁Po pp ies ▁and ▁Polit ics ▁in ▁China ▁that ▁Z eng ▁was ▁the ▁" most ▁famous ▁op ium ▁merchant ▁( who ) ▁made ▁a ▁huge ▁amount ▁of ▁money ▁at ▁the ▁peak ▁of ▁the ▁op ium ▁man ia ." ▁Z eng ▁is ▁frequently ▁referred ▁to ▁as ▁the ▁" K ing ▁of ▁O pi um ." ▁ ▁His ▁contempor aries ▁regarded ▁him ▁as ▁the ▁"