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

"In Ningbo, it is important to be aware of the local customs and etiquette to avoid any unintentional cultural faux pas. For example, it is important to respect the elderly by displaying courtesy and politeness while conversing. In addition, it is important to respect personal space and privacy, and avoid touching any objects or people without permission. Furthermore, it is important to remove your shoes before entering someone's home, as well as avoid displaying too much public affection. Eating with chopsticks is a common custom in China, so it is important to respect this by not using any forks or knives. Moreover, one should be mindful not to discuss sensitive topics - such as politics or religion - as it is considered rude. Lastly, when conversing in Mandarin, try not to use the Mandarin dialect from another province, as this could be seen as disrespectful," mentioned another expat when asked about moving to Ningbo, China, China.