cài lǐ yǒu yìwù méi shú huò wèidào yìcháng shí jíshí jiào fúwùyuán

菜里有异物、没熟或味道异常时，及时叫服务员。

If there is a foreign object in the food, if it's undercooked, or if the taste is off, call the server immediately.