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

"When traveling in Wuhan it is important to be respectful of local customs and traditions. Avoid touching someone on the head as this is a sign of disrespect. Refrain from showing signs of affection in public, such as hand-holding or kissing, which are considered inappropriate in the Wuhan culture. Avoid embarrassing someone by calling them by their first name and always use titles, such as ‘Mr.’ or ‘Mrs.’ when addressing someone. Don't bring up sensitive topics such as politics. Discussions of religion should also be avoided. It is important to try to use chopsticks correctly when eating, as it is considered rude to use them as utensils. Finally, learn how to speak a few simple Chinese words to show respect," said another expat in Wuhan, China, China.