S&P Global Ratings has revised its outlook on Zijin Mining, mainland China’s largest mining company, to positive on the back of expanded production and stronger cost management.The outlook was raised from “stable” to “positive”, with S&P maintaining its “BBB” long-term issuer credit rating for Zijin, according to a statement on Tuesday.The upgrade reflected expectations that Zijin could rank among the world’s top three gold and copper producers by 2028, supported by a robust pipeline of...