Shanghai?Wechem?Chemical?Co.,?Ltd?(?refer?as?Wechem?)?is?registered?in?Shanghai?pilot?free?trade?zone?,?staffed?by?trained?personnel,?combine?many?years?experience?in?process?application?and?marketing?.?Wechem?is?a?Chinese?supplier?of?advanced?materials?.?We?supply?Gases?,?chemicals?,?and?related?products?to?our?customers?in?China?and?worldwide?,?who?are?in?various?industrial?fields?,?such?as?steel?,?ship?building?,?semiconductor?,?optical?fiber?,?medical?,?food?industries?.?