First of all, you should understand what an overnight audit is. The so-called night trial refers to ending one day's work and starting the next. First, you should back up today's data. Second, you should count the data of rooms and restaurants, and then generate the reports you need. Third, we can find out what went wrong that day, for example, if we didn't enter the nationality of the guests, we couldn't pass the night trial. I hope it helps you.