Complimenting others is a lubricant in the process of interpersonal communication, but how to show your sincerity is a technical job. Because many times, we want to express our compliments sincerely, but because of our stupid mouth, the true emotions cannot be conveyed. FFC is a great way to praise. Through the form of F (Feeling) + F (Fact) + C (Compare), your sincerity can be conveyed as much as possible.