Zijin Mining, one of China's largest mining groups, bought a stake for about C $194 million (US $146 million), raising its stake in Canada's Ivanhoe Mining from 9.8 per cent to 13.88 per cent. Zijin has a direct stake of 36.9 per cent in its Kamoa-Kakula copper project, which is expected to become the world's second-largest copper mine and is expected to start production by the end of 2021, according to an independent pre-feasibility study released in February. Copper production is expected to reach 700000 metal tons.