Subject + 与 + Companion + 同行
同行 (tóngxíng) is a verb and adjective meaning "to travel together" or "to accompany." It describes the act of going somewhere with another person or group. It is commonly used in travel and news contexts, as in 与旅行团同行 (to travel with a tour group).
她和闺蜜同行,一起去了日本旅游。
Tā hé guīmì tóngxíng, yìqǐ qù le Rìběn lǚyóu.
She traveled with her best friend and they went to Japan together.
这次出差我和同事同行,路上不会太无聊。
Zhè cì chūchāi wǒ hé tóngshì tóngxíng, lùshang bù huì tài wúliáo.
I'm traveling with a colleague on this business trip, so the journey won't be too boring.
欢迎与我们同行,人多热闹。
Huānyíng yǔ wǒmen tóngxíng, rén duō rènao.
You're welcome to join us — the more the merrier.