The document proposes three ideas for a renren app in China's college market:
1. An app that facilitates event meetings between college students. With a potential market of 20 million college students and $100 million in revenue. Customer interviews and surveys were conducted.
2. A website that helps organize events in China. It would provide value to event hosts.
3. A renren app that ranks and reviews all aspects of college campus life. It would provide value to users.