《新唐书·列传·卷八十一》
良原城墙都倒塌了，旁边都是平原树林和牧草，吐蕃军入侵，经常放牧马匹休养族人于此地。
良原隍堞湮圮，旁皆平林荐草，虏入寇，常牧马休徒于此。
The city walls of Liangyuan had collapsed, and there were flat plains, forests, and pastures nearby. When the Tubo army invaded, they often pastured horses and recuperated their clansmen there.