LME Copper prices gained 0.5 percent yesterday to close at $5779/t as factory activity in major global economies except US showed sharp improvement in March. U.S. manufacturing activity retreated from a 2-1/2-year high in March. Earlier, the China Satellite Manufacturing Index rose to 51.8 from 51.1 in February, indicating factories are doing well, with one of the best readings in the past five years. Besides, private indicators showed Chinese sales manager sentiment and confidence of smalland medium-sized enterprises jumped to the highest in almost two years. Besides, Chinese government think tank report last week said China's economy is likely to grow by 6.8 percent year on year in the first quarter of the year boosted by pick up in production activities and investment.