The non-ferrous metals sector in Hong Kong opened with volatility but gained ground early in the session, with China Nonferrous Mining (01258.HK) and Minmetals Resources (01208.HK) rising more than 4%, and Aluminum Corporation of China (02600.HK) rising more than 2%. with Luoyang Molybdenum (03993.HK) and Zijin Gold International (02259.HK) following suit.