There may be 2 or 4 experiences during the activity, which means that you can get +8 or +4 when you make friends in the same city. Ordinary players get 2 points of experience every 10 second for 30 minutes every day, and then get 1 point of experience every 30 seconds! Purple diamond is to experience 2 points every 10 second for 60 minutes every day, and then experience 1 point every 30 seconds!