1. Log in to Tiancai Shanglong Catering Management System. In the main interface of the system, there may be some function module lists or menus.

2. Find or select the module or menu related to reports. Usually, the business report will be in the Financial Management or Business Analysis module.

3. Once you are on the Business Reports page, look for the option to change the time. The interface may vary from system to system, but typically there will be a date range checkbox or a date field that specifies the start date and end date of the report.

4. Click on the date range selection box or date field to bring up a list of calendar or date selections. Specify the time range of the report you want to view by selecting the start date and end date.

5. After setting the time range for the report, click the Confirm or Apply button and the system will generate a new business report based on your selections.

It is important to note that different F&B management systems may have different interfaces and operating methods, and the above steps are intended as a general guide only. If you are using Tiancai Shanglong Catering Management System and still can't find the specific operation steps, we recommend you to refer to the user manual provided by the system or contact the system administrator for more detailed operation instructions.