DAU：Daily active users (DAUs) here refer to the total number of people who use CRS between 0:00 AM (0:00) to 11:59 PM (23:59) BJT every day. Each single DAU will be counted after completing the process of enabling the AR feature with the designated application installed in a device. The AR feature can be activated multiple times on the same day, but it is only counted as one DAU. If there is already a DAU recorded in the designated application and it is then upgraded to the latest version without losing existing work, the updated version will not duplicate the record. If the application is upgraded to the latest version after deleting the previous one, a new DAU will be calculated when the AR feature is reactivated, adding up to a total of two DAU counts combined with the first record. To sum up, every time when the AR feature is reactivated after the unloading and reloading of the application, a new DAU will be added to the earlier records. DAUs calculated on separate applications in the same device shall not be added together. They are significant parameters that impact service charges. If the user dose not use AR function or CRS , it will not be counted.