1. Don’t trust anyone these days. 2. Don’t be too quick. If someone deliberately buys something expensive and asks you to pay for it, then leave immediately and let her pay. 3. Don’t associate with people who are too poor, an eternal saying... 4. Don’t associate with those who are too vain. 5. Don’t associate with women from places like Sichuan, Chongqing, Hubei, Anhui, and Zhejiang. Good people are rare