[Zhangyuan Tungsten Industry: the company's by-product tin concentrate produces hundreds of tons per year]-- Today, a reporter of the Financial Associated Press learned from Zhangyuan Tungsten Industry that the by-products of the company's tungsten mines are mainly tin concentrate and copper concentrate, of which the annual output of tin concentrate is hundreds of tons. The company said: "the tin concentrate sold by the company is close to 100%, and the company can basically mine all the by-products." Small financial note: the inner and outer prices of tin futures rose sharply today, the price of tin futures on the London Metal Exchange rose 10%, and SN2305, the main contract for Shanghai tin, hit the daily limit in the afternoon, up 12% to close at 218700 yuan / ton. (financial Associated Press reporter Zhang Liangde)