in 1998, caac and cnca approved the establishment of the civil aviation certification center; in 2002, through the accreditation of the accreditation commission of china certification authority (cnas-069) in 2003, a joint venture with the world's largest inspection and insurance hsb company was changed into a hartford global standard certification (beijing) company. in 2004, the first batch of haccp areas of the cdc was recognized. qualification of evidence