China may increase imports of copper ore 20% to a record 5.4 million metric tons this year, Bloomberg reported, citing Simon Collins, director of Trafigura Trading Shanghai Co, a unit of Trafigura Beheer BV, the country's top supplier. China imported 4.5 million tons in 2007. The projected increase will make China the world’s top copper buyer ahead of Japan, which bought 5.05 million tons last year. It has already surpassed ...