We, CHANKIVANCO (BEIJING) International Trading Co., Ltd, confirm with full legal and corporate responsibility under penalty of perjury, that we are ready, willing and able to buy copper concentrate, copper ore and other copper containing byproduct (brass dust, copper slag, copper sludge, copper dross, and copper matte) and the lead-zinc cake) lead concentrate, lead ore and other lead-containing byproduct (lead slag, lead sludge, and nickel concentrate and nickel-containing byproduct (nickel slag, nickel sludge, rough nickel carbonate, rough nickel hydroxide and cobalt nickel scraps)