The maximum order quantity of Shanghai Futures Exchange's limit order is 500 lots. The minimum order quantity is 1 lot, the maximum order quantity of market order is 50 lots, the maximum order quantity of limit order is 100 lots, and the maximum order quantity of soybean meal and soybean oil contract limit order is 1000 lots. The maximum order quantity of corn contract in limit order is 2,000 lots each time. The minimum order quantity of trading orders in Zhengshang Exchange is 1 lot, the maximum order quantity of limit orders is 1 1,000 lots, and the maximum order quantity of market orders is 200 lots at a time. In addition, the maximum number of effective orders for soybean oil intertemporal arbitrage trading shall not exceed 1000 lots, and the maximum number of effective orders for corn intertemporal arbitrage trading shall not exceed 2000 lots;