Secret of the Richest Man: I Am Willing to Spend Money on My Wife

After accidental death, Chen Chen woke up again and traveled to a parallel world, and was bound to the wife system. As long as he spends money on his wife, he can get double cash back. So Chen Chen spent money like crazy for his wife, and unknowingly became the richest man in the world. When someone asked him how he became the richest man, Chen Chen sighed and said, "I'm just willing to spend money for my wife." This article has a single female protagonist