duì chēfèi, yājīn, ménpiào huò jiǔdiàn zhàngdān yǒu yíwèn shí, xiān bǎoliú jiètú huò xiǎopiào

对车费、押金、门票或酒店账单有疑问时，先保留截图或小票。

When you have questions about fares, deposits, tickets, or hotel bills, first keep screenshots or receipts.