fànjú zhōngtú qù xǐshǒujiān, jiē diànhuà huò ná dōngxi, shuō yìshēng jiù kěyǐ

饭局中途去洗手间、接电话或拿东西，说一声就可以。

If you need to go to the restroom, answer a call, or get something in the middle of a dinner party, just let others know.