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Zhejiang Jianzhan Technology Co., Ltd. Was Founded In The 1990s In Hangzhou China, Which Was One Of The Earliest Stone-coated Steel Manufacturers And Metal Roof With Stone Coated Suppliers In China To Produce High Temperature Sintered Color Stone. After More Than 20 Years Of Development, It Has Currently Turned Into A Famous Domestic Enterprise Focusing On Color Stone, Metal Roof, Asphalt Shingle And Other Roof Tile Related Products. With Exclusive Patents Assist Its Products, The Company Stands Out To The Rest Of Its Competitors.