3 sentences

1. 春运期间，火车站的客流达到了顶峰。

   chūn​yùn qī​jiān, huǒ​chē​zhàn de kè​liú dá​dào le dǐng​fēng.

   During the Spring Festival travel rush, passenger flow at the train station reached its peak.

   Source: Dong Chinese Dictionary

2. 为了应对客流，铁路部门新增了多趟列车。

   wèi​le yìng​duì kè​liú, tiě​lù bù​mén xīn​zēng le duō tàng liè​chē.

   To cope with the passenger flow, the railway department has added several more trains.

   Source: Dong Chinese Dictionary

3. 这家商场通过促销活动吸引了大量客流。

   zhè jiā shāng​chǎng tōng​guò cù​xiāo huó​dòng xī​yǐn le dà​liàng kè​liú.

   This shopping mall attracted a large flow of customers through promotional activities.

   Source: Dong Chinese Dictionary