It started after the person who asked for resources under a post asked for resources. In order to express my gratitude, I replied that the good man of the landlord had a safe life, and later used this sentence to express my gratitude.
Usually, after seeking some video resources, I will reply to this sentence to express my gratitude. Later, it was widely used by netizens. Everyone found this sentence very interesting and could express gratitude on many occasions. Everyone began to use this sentence, and even produced many derivative versions, such as "a good man has many children in his life" and so on.