Two-part allegorical saying means: smile every day, and people will naturally be healthy when they are sick.
There is another proverb: Once you live in San Xiao, you will never get old!
Same meaning as above.
The moral of this proverb is to teach us to be happy, to have a good mood, to have a good spirit, and to look good when we are in a good spirit.
The spirit is fine, this is a healthy person, so the disease will not come. People who love to laugh are not too bad luck.