Those six messages were all the personal message that Zhao Fu had received. He was not particularly close with anyone, so apart from those messages, he only had messages from two groups that he was in.
One was from when he was in high school. After being classmates with them for three years, he had some feelings towards those people. They had all split up and pursued their own goals, and because they might not ever see each other again, Zhao Fu decided to join the group to at least keep in contact.
The other group was his university group, which was created by Zheng Dong, and he had added everyone from their class.
Both of these groups had people speaking, and Zhao Fu opened the first group, which was his high school group.
Hao Qun: "Big brother Gao, you've struck it rich! When are you going to treat your old classmates?"