Guangzhou Futures Exchange: Starting from the start of trading on December 29, 2025, the minimum order size for each opening position in polysilicon futures contracts PS2601, PS2602, PS2603, PS2604, PS2605, PS2606, PS2607, PS2608, PS2609, PS2610, PS2611, and PS2612 will be adjusted from 5 lots to 10 lots, while the minimum order size for each closing position will remain at 1 lot.