Founded in 1993, Hangzhou Greatstar Technology specializes in the production and sales of hand tools, smart tools and laser products. In 2014, the operating revenue of Superstar exceeded 2.8 billion yuan, and the net profit reached 500 million yuan, becoming a world-class tool manufacturer. The world's top three home building materials supermarket chains HOMEDEPOT, LOWES, and Kingfisher, as well as the world's three largest retailers, WALMART, Carrefour, and SEARS, all maintain business relationships with Superstar. Gangdun is a brand launched by Greatstar Technology specifically for the domestic high-end tool market, with very strong technical strength, hundreds of patented products and new products on the market every year, and the quality indicators of its products have reached or exceeded ANSI American standards, DIN German standards and Chinese national standards. Corresponding to the high-end market positioning and excellent product quality, the price is generally high, which is basically the same as that of imported brands.