1. Incomplete or inaccurate declaration information: Please ensure that your declaration information is complete and accurate, including the name, quantity and value of the goods.
2. Commodity information does not conform to the customs regulations: Please check whether your commodity information conforms to the customs regulations, including commodity categories and tax rates.
3. Customs system failure: If your declaration information is completely correct, but it is still rejected, it may be because of customs system failure. For more information, please contact the relevant departments.
If your declaration still fails, I suggest you consult the customs department or relevant professionals for more detailed information and help.