My friend’s swimming pool is about to open, and I want to make some promotional slogans. I don’t know what to write on it. Friends, please help!

Diving is strictly prohibited!

The mother and daughter went for a swim in the swimming pool. When the daughter dived, her swimsuit accidentally tore. The mother quickly picked up the placard by the swimming pool to cover her daughter. People couldn't help but laugh after seeing the placard. The placard read: Danger, 2 meters deep, only for skilled persons. My mother quickly turned the placard around. This time, people laughed even more. On the back was: Men only, please take off your clothes before entering. The embarrassed mother took another placard and read: 30 yuan for adults, 10 yuan for children, half price for 20 or more people. So I immediately changed to another one, and almost fainted after seeing it. The placard read: Business hours are 9 a.m. to 10 p.m. Looking at the people laughing so hard that they almost died, my mother’s only hope was pinned on the last placard. But when she saw the placard, she really fainted. The placard read: This is * ** Please keep the area clean for the health of others.