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Manufacturing base:
(1) NO. 16, Guangtong Road, Longquan Town, Zichuan District, Zibo City, Shandong, China
(2) No.27 London Road, Qingdao Free Trade Zone, Qingdao City, Shandong, China
(3) No.171, Industry Road, Zibo Hi-tech District, Zibo City, Shandong, China
Oversea Sales:
Tel: 86-532-86959667 Fax: 86-532-86760085
E-mail: sales@changyuintl.com
Domestic Sales:
Tel: 86-533-5860002、86-533-5860039 Fax: 86-533-5860296
E-mail: gtsales@changyuintl.com
Branch
 Qingdao Guangtong Biotechnology Development Co., Ltd.

Qingdao Guangtong Biotechnology Development Co., Ltd is a biotechnology company located in No. 27, London Road, QingdaoFree Trade Zone. The company was invested by Zibo Guangtong Chemical Co., Ltd in 2002. With strong researching, manufacturing and marketing ability, the company mainly focuses on researching, producing and marketing of long chain dicarboxylic acids and its downstream products. 

 
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