Zambia's main opposition party will target mining companies with poor labor practices if it wins the coming presidential election, its vice president told Dow Jones Newswires Wednesday... Chinese investment in the country's mining industry has for some years come under international scrutiny, with the country accused of disregarding safety regulations and mistreating Zambian workers. NFC Africa [part of China Non-ferrous Metal Industry’s Foreign Engineering & Construction (NFC)] owns the Chambishi copper mine in Zambia...