No entry without a mask.

1, wearing a mask is basic courtesy. Please don't go in without a mask.

Please put on a mask before you come in.

People who don't wear masks are not welcome.

4, wear a mask, be selfish, love him, let him wear a mask.

5. In order to protect yourself, please wear a mask. Thank you.

Extended data:

Ways to convince family members who refuse to wear masks when traveling:

1. Notify the novel coronavirus epidemic in China:

If you want to convince your family members who refuse to wear masks when traveling, you can first tell them about the epidemic situation in novel coronavirus and let them understand the significance of wearing masks.

2. Tell some cities to wear masks when traveling:

It should also be noted that some cities have required wearing masks when traveling, for example, Nanjing, Jiangsu Province and Guangdong Province. Such an example can make the family understand that it is impossible to wear a mask.

3. Wearing a mask can prevent novel coronavirus infection;

Telling family members to wear masks can prevent novel coronavirus from being infected, because masks can prevent others' saliva from splashing on us, thus avoiding infection.

4, wearing a mask can avoid close contact with others:

Wearing a mask can avoid close contact with others, because close contact can easily lead to infection. You can discuss it with your family. Close contacts are likely to become suspected novel coronavirus patients.

5. If you don't wear a mask in public, it means that you have a problem and it will be transmitted to others:

If we don't wear masks in public, then if we are infected with novel coronavirus, it will be transmitted to others, which is obviously not good, so that our families will understand better.