At present, the primary production capacity of Shanghai Copper is 5 tons, and the margin ratio of the previous period has been adjusted from 8% to 12%, and the futures company will raise it by 3% to 15%. The latest offer is 52,600 yuan/ton. So 52600*5*0. 15=39450 yuan/hand. Considering the problem of fund management, at least three times of funds can open a first-hand warehouse.