Rongsheng (including Shengyuan) Petrochemical has raised the quotation for polyester filament by 50-200 yuan from Saturday to date. Semi-dull FDY: 30D/24F quoted at 9,350 yuan, 75/36 at 7,050 yuan, 150/96 at 6,950 yuan, 200/48 at 6,900 yuan, 200/96 at 6,850 yuan, 300/96 at 6,950 yuan; black yarn 150D/48F quoted at 7,400 yuan, black yarn 300D/96F quoted at 7,550 yuan. PriceSeek analysis of polyester FDY, long-short score: +1.5. Rongsheng Petrochemical has increased the quotation for polyester filament (including semi-dull FDY and black yarn) by 50-200 yuan, such as semi-dull FDY 30D/24F quoted at 9,350 yuan and black yarn 300D/96F quoted at 7,550 yuan, indicating tightening supply or strengthening demand in the spot market, driving prices upward. The score is +1.5 (strong positive), as the significant increase (up to 200 yuan) may reflect rising raw material costs or recovering demand in the downstream textile industry, providing direct support for the spot price of polyester FDY.