大炼化周报：下游需求仍较弱，涤纶长丝偏弱运行

Investment Rating - The report does not explicitly state an investment rating for the industry. Core Insights - The downstream demand remains weak, with polyester filament showing a weak performance. The average prices for POY, FDY, and DTY are 6700, 7321, and 8218 CNY/ton respectively, with week-on-week changes of -100, -64, and -129 CNY/ton [2][3]. - The domestic refining projects have a price difference of 2534.30 CNY/ton, which is an increase of 101.01 CNY/ton (4.15% week-on-week) [2][3]. - The PX average price is 813.86 USD/ton, down by 1.14 USD/ton, with a price difference from crude oil of 287.60 USD/ton, up by 5.39 USD/ton [3]. Summary by Sections 1. Refining Sector - Domestic refined oil prices for gasoline, diesel, and aviation kerosene have increased, while international prices for the same products have decreased [2]. 2. Polyester Sector - The average prices for POY, FDY, and DTY are 6700, 7321, and 8218 CNY/ton respectively, with week-on-week changes of -100, -64, and -129 CNY/ton [2]. - The weekly average profits for POY, FDY, and DTY are -81, 66, and 64 CNY/ton respectively, with week-on-week changes of -78, -54, and -97 CNY/ton [2]. - The inventory days for POY, FDY, and DTY are 11.6, 17.9, and 23.5 days respectively, with week-on-week changes of -5.7, -3.9, and -1.4 days [2]. 3. Chemical Sector - The PX average price is 813.86 USD/ton, down by 1.14 USD/ton, with an operating rate of 86.03%, up by 0.38 percentage points [3].