In may 1997 , he was among seven chinese entities sanctioned , pursuant to the chemical and biological weapons control and warfare elimination act of 1991 , for knowingly and materially assisting iran s chemical weapons program through the transfer of chemical weapons precursor chemicals andor chemical weapons - related production equipment and technology 根據(jù)1991年的《管制化學(xué)與生物武器和消除化學(xué)與生物戰(zhàn)爭(zhēng)法》 ,他是于1997年5月因故意通過(guò)轉(zhuǎn)讓制造化學(xué)武器的前體化學(xué)品和或與化學(xué)武器相關(guān)的生產(chǎn)設(shè)備和技術(shù)向伊朗化學(xué)武器項(xiàng)目提供物質(zhì)援助而受到制裁的7個(gè)中國(guó)有關(guān)實(shí)體之一。