My parents are going to travel to Hong Kong and Macau. What do you need to pay attention to when going through customs and security check or what do you need to pay attention to in Hong Kong?

There is nothing special to pay attention to when going through security and customs. Just follow the guidance of the staff and don't carry drinks and other liquids with you on the plane. There is nothing wrong with Hong Kong and Macao customs. Just checking identities.

Order is more important in Hong Kong. For example, people who get on and off the elevator always stand on the right (not necessarily on the right, just stand with others), because the other side has to make way for people who are in a hurry to get on and off. No matter what you do, you have to queue up, especially waiting for the bus. If you don't line up, you will be excluded. Everything else is about public places, such as not littering. Although it is said in China, it is actually nobody's business. Hong Kong is different. Don't bring more than two cans of milk powder when you come back, you will be arrested by the Hong Kong police. . . There are many sensitive magazines in Hong Kong, so don't buy them. It's hard to get into the customs if you buy it.