1. Social needs
We all know that in the 1960s or earlier, friends or deceased people far away used letters to communicate with each other. At that time, it was inconvenient to write a letter [put it in the mailbox], and there was no guarantee in terms of time [maybe 3 months to 10 days]. We couldn't talk anywhere and anytime like standing by our side.
So launch ==> QQ [Provide real-time chat]
2. Product portrait
3. Product demand
