The construction of the fifth-phase catalytic unit is nearing completion, and the pipeline purge has been basically completed; three investigations, four determinations, and the last 470 items have been completed, and 415 gas separation MTBE devices have been completed, 102 items have been completed; 59 items have been completed. The tail items affecting the two appliances and the flue oven are basically completed. In terms of thermal insulation, 90% of the catalytic unit is completed, 93% of the gas separation MTBE unit is completed, and 78% of the alkylation unit is completed. Other closing work is in an orderly manner.