▁M 2 4 0 ▁co ax ial ▁general - pur pose ▁machine ▁gun ▁fitted ▁onto ▁a ▁Type ▁ 8 6 ▁h ull . ▁Further ▁development ▁ceased ▁when ▁the ▁US ▁government ▁prohib ited ▁any ▁further ▁collaboration ▁with ▁the ▁Chinese ▁as ▁a ▁response ▁to ▁the ▁T ian an men ▁Square ▁crack down . ▁At ▁the ▁end ▁of ▁the ▁ 1 9 8 0 s , ▁the ▁Chinese , ▁with ▁the ▁help ▁of ▁the ▁US ▁F MC ▁company , ▁designed ▁the ▁Type ▁ 8 6 - I ▁( W Z ▁ 5 0 1 A ) ▁IF V ▁with ▁a ▁new ▁overhead ▁mount ▁tur ret ▁( the ▁same ▁as ▁mounted ▁on ▁W Z ▁ 5 5 1 ▁whe e led ▁IF V s ), ▁armed ▁with ▁a ▁lic ensed ▁Chinese ▁copy ▁of ▁a ▁ 2 5   mm ▁M 2 4 2 ▁Bush master ▁aut oc annon ▁and ▁a ▁ 7 . 6 2   mm ▁Type ▁ 8 6 ▁co ax ial ▁machine ▁gun ▁( a ▁Chinese ▁copy ▁of ▁the ▁ 7 . 6 2   mm ▁PK T ▁tank ▁machine ▁gun ). ▁It ▁was ▁reported ▁that ▁ 3 5 0 ▁W Z ▁ 5 0 1 A ▁IF V s ▁were ▁produced ▁for ▁the ▁P LA . ▁ ▁The ▁Chinese ▁developed ▁a ▁family ▁of ▁arm ored ▁fighting ▁vehicles ▁based ▁on ▁the ▁W Z ▁ 5 0 1 ▁IF V ▁which ▁includes ▁a ▁nuclear , ▁bi ological ▁and ▁chemical ▁( N BC ) ▁reconna issance ▁vehicle ; ▁a ▁battle field ▁surve ill ance ▁vehicle ;