Harbin post-60 s and post-70 s single friends group: The role of Harbin post-60 s and post-70 s single friends group is mainly to provide a special social platform where singles of this age can meet, communicate and establish contacts. The goal of this social group is to help singles expand their social circle, make like-minded friends and have the opportunity to find their other half.

Harbin post-60 s and post-70 s students: The role of Harbin post-60 s and post-70 s students is mainly to provide a platform for communication and sharing, so that people of this age can reconnect with their old classmates, recall the past and share their lives and work. This social group aims to strengthen the ties and friendship between students and promote exchanges and understanding between them.