1989 Jun. 12	Tianjin Zhiling Machining Dept. was founded by the Chairman, Zhiling Gao
	1997 Dec. 24	Tianjin Dongli District Jinjun Butterfly Valve Factory was founded
	1999 Dec. 13	Tianjin Hailong Valve Industry Co. was founded
	2000 May  18	Tianjin Huihua Valve Industry Company was founded
	2001 Dec. 28	Hailong was ISO9000 Certificated by China Great Wall Quality Assurance Center
	2002 Sep. 24	Huihua Valve was approved PED/CE by
	2002 Oct. 29	Huihua Valve was ISO9002 Certificated by
	2004 .	Huihua Past SGS ISO9001:2000  Accredit