What should two people pay attention to when traveling in Beihai?

Pay attention to black cars when traveling to Beihai. There are many such soliciting personnel in trains, docks and airports. They will give you a ride in their car for various reasons, and then recommend you cheap hotels and book cheap tickets for scenic spots. Others will treat you as a fellow villager, reducing your awareness of prevention. If I don't see you, I'll kill you. In addition, it is suggested to go to the market to buy food and then find a place to process it.