Make friends with Chinese

If you are a foreign tourist, whenever you want to take pictures of some Chinese people, it is always better to ask for the permission from the very person beforehand. Be punctual. For some of your sightseeing and activities in China, punctuality is required, being late may incur the bad consequence of missing boat, train and even airplane, so your personal attention and cooperation will benefit yourself. Especially if you travel with a group, it is wise to be on time so as not to hold up the entire group.
Social behavior in China is highly ethical, so it is not acceptable that any people take towels, ashtrays and so on from hotels, trains or other places as souvenirs.  many Chinese have an excellent sense of humor, but it usually avoids sexual or political subjects. Try to understand The concept of the 'face' in China: "face" can be loosely defined as the 'status' or 'self-respect' in Chinese and by no means alien to you. It is the worst thing for a Chinese to lose face, so it is advisable that never insult, embarrass, shame, yell at, demean a Chinese person or try to prove someone wrong in public, which would risk putting a Chinese in a situation that he lose his face. In order to get a successful effect without letting a Chinese lose face, it is better that any criticism be delivered privately, discreetly and tactfully, otherwise, the effect would be just opposite to what you wish.