For users, if they use it, they may lose their signature. If they lose their signature, they can only make it up, and they don't lose their signature at the same time. Some applications of the same card bookmark may be lost in the morning, and some applications may be lost in the afternoon or even the next day. Therefore, in general, signature service providers are well-informed, and can know the information of lost signatures at the first time, and then start to make up the signatures. Micro-diversion platform can be signed online.