What you want to ask is what to do if there is no record after playing double speed for the continuing education of fire engineers? Consult the administrator or customer service of the platform or learning system, try different double-speed playback methods, and learn the length of time according to the regulations of the platform or learning system. According to query 233, the online school displays.

1. Ask the administrator or customer service of the platform or learning system: You can contact the administrator or customer service of the online education platform or learning system you are using and ask about the policy or operation method of double-speed playback. They may provide specific solutions or instructions.

2. Try different double-speed playback methods: Some online education platforms or learning systems may limit double-speed playback, but may support other forms of double-speed playback, such as double-speed playback through external browser plug-ins or video players. You can try different double-speed playback methods to see if they can meet your needs.

3. Learning duration according to the regulations of the platform or learning system: If you can't bypass the double-speed playback restrictions of the platform or learning system, you may need to calculate the learning duration according to the regulations of the platform or learning system and the actual video duration after double-speed playback.