Don't pay a penny, just accompany the next sentence.

If you don't pay a penny, you will be accompanied. The next sentence is sincerity, which is the killer. "If you don't spend a penny, it is companionship, and sincerity is the killer." This is a joke circulating in the coin collection field, which means that the coin collector "owns" the coin without paying. This sentence is the stem of the field of coin collection.