[Notice issued by Shanghai Futures Exchange on adjusting the transaction fees of alumina futures contracts] After research and decision, starting from the trading on May 26, 2025 (i.e. the night trading on May 23): the transaction fee of alumina futures AO2509 contract will be adjusted to 0.03% of the transaction amount, and the transaction fee for closing the current position within the day will be adjusted to 0.03% of the transaction amount.