”WYJ" is a famous brand of chinese iron pots, founded in Qing Dynasty(1644-1661). In the seventeenth year of Daoguang period(1837). it was posted by Qing government and named "WYJ smelt workshop".It was the earliest large smelt workshop(government designated smelt workshop)in the south of the yangtze river.All food pots sold are sealed with a red stamp of WYJ brand, which is trusted by users.The brand was protected by the Jiangnan general administration of commerce of the Qing Dynasty. At the end of Qing Dynasty, when shanghai Xinyuanlai, Nantong Zisheng and other nearly ten smelting workshops were founded,most of pot craftsmen came from WYJ, thus forming the unique quality subang iron pot, referred to as "su-guo",WYJ is the birthplace of su-guo.In 1930, the trademark "WYJ" was registered. In the 1950s, there was 7 smelting workshops in wuxi city, that were merged into WYJ, a gathering of famous craftsmen, including the craftsman of cao-san-fang smelting workshop in Ming Dynasty,In 1964 and 1981, Jiang-su province issued 2 enterprise standards for cast iron pots, both of which were based on the WYJ standard. Participated in the national cast iron pot quality appraisal many times and won the first place. Relevant national departments held 2 on-site meetings to promote WYJ's creative experience in skills to the whole country, The products are sold in 26 province, municipalities and autonomous regions across the