Domestic futures with the same variety, the same contract and the same direction are automatically merged.
Opening a position is to start trading, and closing a position is to end trading. The object of closing the position is to open the position today and close it on the same day. Futures are T+0 transactions, and positions can be closed on the day of opening. Some varieties are free today, and only the opening fee is charged, but if you keep the warehouse until the next day, you need to pay the closing fee.
RX is a horizontal needle, and the heat is 5 as the original factory. HX aimed at the needle, but the heat was 6. The gap of spark plu