Speaking of Xiaonei, whether high school students or college students are quite familiar with it, right? But recently, when it was said that "Xiaonei" would be renamed "Renren", I couldn't bear it mentally. Judging from the name "Xiaonei", I think it is a bridge for schoolmates who are separated by going to university or working. However, now that it's said to be renamed as "Renren", I feel that the meaning has changed a bit. Then, what's the difference between it and those "Kaixin" and "Happy Nest"?