What is the sign to keep quiet?

The sign to keep quiet is as shown below:

The sign to keep quiet is as follows:

1. Be polite and polite, and do not make any noise.

2. Quiet fantasy is an angel’s dream. ?

3. Sit down and read carefully, be so grateful; love and protect the museum as a legacy. ?

4. The students are all studying, so let’s not disturb them, okay.

5. Stay quiet when you come, and leave praise when you leave. ?

6. Silence is better than sound at this time. ?

7. The birds are perching on the branches, we should not disturb them. ?

8. The books are meditating, please don’t make any noise. ?

9. Less noise and more silence. ?

10. Don’t speak loudly to scare others. ?

11. Your soft words show respect to everyone. ?

12. Quiet, gentle and elegant.