What cultural faux pas should I try to avoid making in Tianjin?

"1. Refrain from discussing any political views as it is not appropriate in Chinese culture. 2. Avoid referring to other people or places by nicknames; use proper titles and honorifics. 3. Avoid bringing up sensitive topics such as Taiwan, Tibet and Falun Gong. 4. When entering someone's home, always respect their house and the rules of their home. 5. Do not shout or lose your temper in public. Chinese people generally keep their emotions in check. 6. Do not touch or offer to shake hands with someone of the opposite sex who is not a close relative or friend. 7. Do not point with your index finger; this is considered rude in many parts of China. 8. Do not open gifts in front of the giver as this is considered inappropriate," said another expat in Tianjin, China, China.