Group 1 - AAA credit enterprises represent the highest level of corporate creditworthiness recognized by the state, indicating good reputation and stable operations [1] - Companies with AAA certification are more likely to be chosen for projects over those without, similar to consumer preferences for reputable brands [1] Group 2 - Applications for AAA certification can be processed through recognized credit rating agencies, either online or in person, with detailed guidance available [2] - The application process requires submission of specific materials, which must be electronically signed, and involves a fee ranging from 1,000 to 3,000 RMB [2] - The evaluation process typically takes 2-5 working days, and if successful, the company receives a credit rating certificate valid for three years [2] Group 3 - Eligibility criteria for AAA certification include being a legally registered entity, having been in operation for at least three years, and maintaining a healthy financial status [3] - Companies must have a good credit history without serious legal violations and should provide quality products or services with effective after-sales support [3] - A well-established management system is also required, covering areas such as financial and human resources management [3]