During the technical testing period, the POPO product team will select some users from the large number of POPO users to invite them to participate in the technical testing, in order to help improve the product service. The invited users will receive floating window notifications on POPO or invitation emails from [email protected], please pay attention. If you do not receive the invitation notification, you can also apply to participate in the technical testing on our website (address: http://preview.popo.163.com/techPreview/apply.jsp). After a successful application, the information you submit will enter the waiting list, and we will gradually open up the testing based on the information you provided and the number of applicants.