If you want to join a middle-aged and elderly singles group, you must first determine the group number, and then apply to join. If it is QQ, there is a plus sign on the upper right corner of , click to search for the group, and then apply. Assuming that your situation matches, it will generally pass. Some senior groups have QR codes, and you can join by scanning the QR code. Or if you already know someone in the group, you can ask him to add you to the group. It only needs to be approved by the group owner.