guìzhòng wùpǐn búyào suíshǒu fàng zài yǐzi shàng zuìhǎo ràng tóngxíng de rén bāng nǐ bǎoguǎn

贵重物品不要随手放在椅子上，最好让同行的人帮你保管。

Do not leave valuable items on a chair; it is best to have your companions keep them safe for you.