1, wrong format. If you upload doc or docx to HowNet for testing, the test system can't test the pictures and forms inside. HowNet will exclude papers and references and will not participate in the test. If the format is wrong, the system will automatically detect it as text, and if it is copied, it will be marked as red.

2. The propaganda unit is on a business trip. If a number is missing in the formula table, the error of the publicity unit will be detected, resulting in unsuccessful uploading.