Hello, the approval currently supports electronic signature, and the approval of important matters can be completed on the mobile phone. If you encounter problems with abnormal approval manuals (such as failure to generate signatures, etc.). ), please submit feedback in the following path, nailed by mobile phone: avatar in the upper left corner of the message page-service hall-fault submission computer nailed: avatar in the upper left corner-my customer service-fault submission, select the corresponding category, and submit the situation according to the page guidance (screenshot+description). If the phone encounters abnormal use problems, please write down the phone model and nail version number. After submission, technicians will check it as soon as possible, and I will reply to you through the nail secretary window if there is any news. Tips: 1, Android phone supports screen capture of nail abnormal interface, and you can click to jump to the abnormal feedback interface to submit; 2. If you need to submit suggestions/requirements, you can submit them here: mobile phone nail-avatar-service hall-product suggestion. Thank you for your support!