After you add a U shield to your personal online banking, the online banking system will prompt "Please insert a U shield for signature transaction!" When you transfer money and pay online. . At this point, please insert the U shield and click OK. Enter the U shield password according to the page prompts to complete the transaction. According to the situation you described, it is possible that your U shield is not connected to the computer. Please pull out the U shield and plug it in again (it is recommended to plug in the USB interface on the motherboard instead of the front interface). If the indicator light on the key lights up, it means that the connection is good and you can operate it again. If the problem still cannot be solved, please follow the following steps: 1. Reinstall the driver corresponding to the U shield brand (do not insert the U shield during installation): 1) Unplug the U shield and uninstall the original driver; 2) Logging in to windows also has system administrator rights; 3) Log in to www.icbc.com.cn, the website of Industrial and Commercial Bank of China, and download and install the driver matching the type of U shield in "Download" under "Personal Online Banking Login" on the left side of the home page. 2. Check whether your system has been completely patched. If not, please use the update function of WINDOWS to upgrade. 3. If your system is 2000 or XP, please select "Services" under "Administrative Tools" in the control panel to see if the smart card is enabled. If not, please enable it.