The quality standard of the subject matter of copper futures contract was GB466-82 before September 1997, and the delivery product was No. 1 copper. From September 1997 to August 1998, GB466-82 and GB/T-467-1997 were fulfilled simultaneously. Since September 1998, all the standards of GB/T467-1997 were fulfilled. High purity cathode copper and standard cathode copper could be delivered without quality promotion and sticking water, as long as the brand was raw and sticking water. 1. Chemical composition of standard cathode copper (Cu-CATH-2) 2. Chemical composition of high purity cathode copper (Cu-CATH-1): Cu+Ag is not less than 99.95, total impurity content does not exceed 0.0065 (impurity classification content is slight).