I. Core Evaluation Dimensions
The reliability of VIN parsing results can be determined by the combination of the following two fields:
- matching_mode
- gonggao_no_matching_type
II. Field Details
1. matching_mode
matching_mode=exact_match
The VIN has official OEM data in the EPC system. The parsing result is based on complete vehicle parameter matching (including core fields like vehicle series/chassis model/engine configuration), with the highest data credibility.
matching_mode=in_exact_match
No complete data found in the EPC system. The parsing result relies on algorithm inference. Cross-validation with other fields is recommended.
2. gonggao_no_matching_type
This field applies only to China-manufactured vehicles (VIN starting with L/H). The announcement number in the Ministry of Industry and Information Technology's (MIIT) Road Vehicle Manufacturers and Products Announcement serves as the vehicle's legal identity identifier, containing 30+ technical filing parameters.
gonggao_no_matching_type=实码解析
The parsing result is linked to actual announcement number data, ensuring vehicle core parameters (e.g., emission standards/safety configurations) match MIIT filings.
gonggao_no_matching_type=Empty
No announcement number data linked, possibly due to unregistered VIN or missing announcement number information.
III. Accuracy Priority Ranking
(Highest to lowest)
● matching_mode=exact_match + gonggao_no_matching_type=实码解析
● matching_mode=exact_match + gonggao_no_matching_type=Empty
● matching_mode=in_exact_match + gonggao_no_matching_type=实码解析
● matching_mode=in_exact_match + gonggao_no_matching_type=Empty
