tā / zài / nèi / měng / gǔ / lǚ / xíng / shí / jié / shí / le / jǐ / wèi / měng / zú / péng / you

他在内蒙古旅行时，结识了几位蒙族朋友。

While traveling in Inner Mongolia, he made friends with several Mongol people.