Why should smoking be banned on the high-speed rail?

Hello, the reason why smoking is forbidden on the train is that it is impossible to distinguish whether there is smoke or fire smoke on the train. In the future, in order to prevent the fire-fighting opportunity from being missed, a smoke alarm will be installed. Smoking will interfere with the judgment of the smoke alarm, so smoking is not allowed on the train to ensure the safety of the whole train. I hope my answer can help you. I hope it can be adopted. Thank you.