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　Reaction–regeneration system: The crude oil enters the asphalt modification feed tank area where it is blended. The asphalt modification feed is pumped out from the feed tank area by the feed pump and sent to the unit’s crude oil buffer tank <V-207>. From there, it is pumped by the crude oil pump <P-201/AB> to E204, where it exchanges heat with the top circulation stream; then it goes to E205/AB to exchange heat with the fuel oil, and finally reaches E210, where it exchanges heat with the circulating slurry until the temperature reaches around 200°C. It is then mixed with the reprocessed oil at a temperature of about 320°C, extracted from V-201, using P-207/AB. This mixture is divided into two streams: one stream enters the reprocessed oil tank <V201> and the distillation column via the raw material emergency bypass line, while the other stream goes into the lower inlet of the riser reactor. The slurry for reprocessing enters the upper inlet of the riser reactor, and the terminator enters the upper inlet of the same reactor. The crude oil comes into contact with regenerated catalyst at 650°C–670°C within the riser reactor, flowing upward in a plug flow pattern to undergo reaction, resulting in products such as dry gas, liquefied gas, solvent oil, light fuel oil, and oil slurry. The coke formed is adsorbed on the surface of the catalyst, turning it into green catalyst. After passing through the coarse cyclone separator at the outlet of the riser reactor, the oil and gas are separated from the green catalyst; the oil and gas then enter a settler, where they are further separated by a single-stage cyclone separator at the top of the settler. Subsequently, the oil and gas proceed to a distillation tower. The green catalyst, after being separated, enters the stripping section of the settler, where it comes into contact with rising stripping steam in order to have the oil and gas removed from it. The green catalyst then passes through vertical pipes and check valves into the dense-bed regenerator, where it undergoes complete regeneration at a temperature of around 670°C, with the aid of oxygen-enriched air and CO as combustion aids. The catalyst that has been regenerated is known as a regenerated catalyst, and it is sent back into use in the riser reactor via regenerative inclined tubes and regenerative slide valves. The excess heat during the regeneration process is removed by an external heat extractor. Part of the catalyst in the regenerator enters the shell side through the external heat extraction inlet; after being cooled by the fins and tubes of the external heat exchanger, the catalyst is conveyed to the dense-phase bed of the regenerator by lift air. Both the fluidization air of the external heat exchanger and the lift air are pressurized air. The flue gas inside the regenerator passes through a regenerative cyclone separator to remove the catalyst carried by the flue gas. The flue gas then enters a three-stage cyclone separator, which separates catalyst particles larger than 30 μm. The flue gas exiting the three-stage cyclone separator is divided into two streams: one stream goes to the flue gas exhaust fan, while the other stream is sent to the flue gas waste heat boiler via a double-acting slide valve. The catalyst coming out of the third-stage cyclone separator enters the waste catalyst storage tank; the flue gas from this tank passes through the fourth-stage cyclone separator before going to the critical flow nozzle and entering the flue gas waste heat boiler