?? ??
?????????????????????????????1997?8?????????????????
?? ??
?? ??
??:???????????????????881?
??：+86-412-8410999 / 8439888 / 8425000 / 8415555
???：+86-13904227222
??：+86-412-8439333
??：beida@chinabeidachem.com renhuanyong@chinabeidachem.com
MSN：sallylisaa@hotmail.com
???：www.hoctienganhquan2.com
