There is a system error or malfunction in the software. The main reason why Lin Lang Timekeeping Software doesn't display the time is that there is system disorder or software damage inside the software, which leads to serious loopholes, leading to obvious failure of the software, which can't make normal timing and time zone connection, and can't be updated. If it is impossible to update, you can choose to restart the forest wave timing software, or uninstall the software and reinstall it. Lin Lang Timekeeping app is a timing training service platform for motor vehicle drivers. The platform has the theoretical and practical learning function of subject one and subject four, which can help users to learn driving test better.