China reverted to being a net aluminium exporter in September, official data showed on Friday, as the price gap between foreign and domestic metal narrowed, making shipments from overseas more expensive and reducing import volumes. The world’s top aluminium producing country imported 355,999 tonnes of unwrought aluminium and aluminium products last month, the General Administration of Customs said. That compared with exports of 426,469 tonnes.September imports rose 642% from a year earlier but were down 17.1% from 429,464 tonnes in August, which was a more than 11-year high and the second-biggest monthly volume China ... (full story)