Kong Mines Ltd / Nittetsu Mining Co. / Taiwan Development Co. / Ng Fuk Black Lead Mining Co. / Yan Hing Mining Co. Ltd / Brothers Islands Graphite Tin Bo Mining Development Corp. / Needle Hill Wolframite Marsman Hong Kong China Ltd. / Mutual Trust Co. Ltd / Shan Magnetite Hong Kong Iron Mining Co. / New Territories Mining Co. / Hoong Foo Mining Co. / Nielson and Co. / /