會心一笑

Can; to be able to; to know how to; to meet; to gather; a meeting; a gathering; a moment; to reckon accounts.

The physical heart; the mind or intellect; feelings or emotions; the center or core of something; intention or will.

The number one; single; a; as soon as; entire; whole; all; a "one" radical in Chinese characters; also used for clarity when spelling out numbers.

To laugh or smile; to laugh at or mock someone; a polite term used when giving a gift.