Benchmark delivery: 328B-grade domestic serrated fine wool white cotton that meets the national cotton standard (GB1103-1999). (2) Substitute: domestic serrated fine-wool white cotton that meets the national cotton standard (GB1103-1999), except for 328B, the grade is above grade 4 (including grade 4), the length is above 28mm (including grade 4), and the micronaire values are A and B, which can be used. America and Australia. (3) After the cotton that meets the delivery grades in Items (1) and (2) of this article goes through the delivery and warehousing procedures, if the cotton grade drops due to natural variation, it can still go through the warehousing procedures normally. (4) Only the cotton with the original cotton standard warehouse receipt certificate and valid inspection certificate can be used for futures delivery. (5) The net weight of each batch of cotton is 20 0.5 tons, and the number of packages containing foreign fibers in the total number of samples is within 65438 00% (including 65438 00%, rounded off), which can be used for futures delivery, otherwise it shall not be used for futures delivery. (6) Premium: 1. Grade premium: 3% for Grade I, 2% for Grade II, 6% for Grade IV, and 6% for all grades below Grade IV.