Then I saw a friend pk click on the interface, and then I entered the Add Friend Pk page, where I can choose one or more friends to challenge PK. The main item of PK is the number of steps. It should be noted that iphone users only need to open the health app to synchronize, while on Android, mobile QQ uses a third-party sports app to obtain health data. When selected, you will be prompted to confirm the initiation of PK. At this time, I just need to click OK, and finally wait for my friends to accept the PK gauntlet.