Xinhua News Agency, May 9, the Shanghai Futures Exchange drafted the "Shanghai Futures Exchange Alumina Futures contract" and "measures for delivery of Alumina Depot designated by the Shanghai Futures Exchange (for trial implementation)", revised six business rules, including the "settlement rules of the Shanghai Futures Exchange," and is now openly soliciting opinions from the public. Alumina trading unit is 20 tons / ton; quotation unit is yuan (RMB) / ton; the minimum change price is 1 yuan / ton; the range of price limit is ±4% of the settlement price of the previous trading day; the contract month is from January to December; the trading time is 9: 00 in the morning, 30 in the afternoon, 3: 00 in the previous period.