Gǔ / shī / zhōng / cháng / yòng / guān / shān / miáo / xiě / biān / sài / dì / qū / de / xiǎn / yào / dì / shì

古诗中常用关山描写边塞地区的险要地势。

Ancient poetry often uses passes and mountains to describe the rugged terrain of frontier regions.