In 1991, Changshu pharmachemical factory was founded and paracetamol had been produced with its registered trade mark Chengzhu.

In 1993, joint ventured by HongKong Huiguan international company, Changshu Huagang Pharmaceutical Co.,Ltd. was founded.

In 1994, conferred the right of import and export, it started import and export business directly with foreign partners.

In 1995, folacin has been on stream. The output and quantity of export of folacin and paracetamol both have come up to 80%.

In 1996, Huagang has been ranked first in Asian accounting to the volume of output and export. It has generated a brand effect and won a good credit meanwhile.

In 1998, employed world advanced equipment, it began yielding DC90%、 DC96%.

In 2003, it has been successfully transformed from a state and collectively owned corporation into a privately owned one

In 2004, audit by national GMP and achieved GMP certificate.

In 2007, waltz through the GMP audit on the spot by EDQM .

In 2008, got COS certificate and started U.S. DMF registration and FDA authorization.