gǔ / dài / tiān / zǐ / dìng / qī / lüè / dì / yǐ / shì / chá / gè / zhū / hóu / guó / de / biān / jìng

古代天子定期略地，以视察各诸侯国的边境。

In ancient times, the emperor regularly patrolled the border to inspect the vassal states.