From April 5, 2007, 2065438+,the maximum order quantity of Shanghai and Shenzhen 300, SSE 50 and CSI 500 stock index futures contracts was adjusted to one-time 20 lots, and the maximum order quantity of market orders was adjusted to one-time 10 lots; For 5-year and 10-year treasury bond futures contracts, the maximum order quantity of limit orders is adjusted to 50 lots each time, and the maximum order quantity of market orders is adjusted to 30 lots each time. The minimum order quantity of contract trading order is 1 lot, the maximum order quantity of market order is 30 lots, and the maximum order quantity of limit order is 50 lots.