And in fact, if you look in Chinese, the word "bú kè qì" in Chinese, "You're welcome," means, "Don't be formal; we're family. We don't need to go through those formalities."
Y, de hecho, en chino, la palabra "bú kè qì" en chino,  "De nada", significa, "No seas formal, somos familia. No precisamos formalidades".