Shanghai Yingsai Industry Co., Ltd. was established in 2002, it has grown into a diversifying company with its business scope covering packing materials and security products, which radiates its profound influence all over China. Its offices are set up in Southwest, South and North of China. The company has been sticking to its managerial principles of integrity first, quality super hard which has won long-term reliance and support from customers. Shanghai Yingsai Industry Co., Ltd. administrates Shanghai Weixun Chemistry Trading Company and Shanghai WinSeal enterprise Co., Ltd. The featured product of Shanghai Weixun Chemistry Trading Company is transparent moralized dyes which have possessed 70 percent of the market share, and now it is expanding its markets to Southeast Asia, such as Vietnam, Cambodia and Thailand. Shanghai WinSeal enterprise Co., Ltd. mainly specializes in its production security seals include plastic seals , cable seals , high security bolt seals .