Kunming-based Yunnan Tin Co, the world’s largest producer of the metal, said Wednesday its profits for the first nine-months of the year may surge as much as fourfold as rising sales and prices outweigh higher tax costs and a stronger RMB, the Economy Daily reported. Net income may grow between 250% and 300% from last year’s US$14.55 million (RMB110 million, while half-year profits could grow almost sixfold, the company said in a ...