Hongkong has about forty beaches. They are open to all people. Some of the beaches are the best in the world. People can go there for a swim. You can go to most of them by bus. To go to some beaches you have to take a boat. There are toilets, clothes changing rooms and places to buy food and drinks on most of the beaches. You will swim there safely if you do as the following: 1. Don't swim alone. You should go with an adult or your friends. 2. Don't swim right after a meal or when you are hungry or tired. 3. You should not stay in the water too long. 4. Do not go out in a boat if you can't swim or if you're not wearing a life jacket. Remember: A red flag  means that it is dangerous for anyone to go into the water. A blue flag means that it is dangerous for children and weak swimmers to enter the sea. The writer wants to tell us   _  .
something about Hong Kong beaches and swimming rules there that swimming in Hong Kong is dangerous that Hong Kong has many best beaches in the world it is not easy to go swimming in Hong Kong