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Wi ntersun International, Inc DBA Wintersun Chemical is an independent, private specialty chemical distributor in the United States. Our principal office is located in Ontario, Southern California. We started Wintersun Group ( USA ) Inc. in 1997 and then in 2001, We set up Wintersun International Inc to continue its business. Wintersun Group Inc still keeps its existence as the inventing company in the real estate. Besides the support from its own manufacturing facilities in China, Wintersun has set up the strong and long-term partnership with many domestic and international suppliers through the years. Our success is built on the strong relationship with our quality manufacturers. This ensures we provide our customers with consistent, reliable sources of specialty chemicals.