《资治通鉴·唐纪·唐纪六十三》
从此以后，吐蕃在南路无后顾之忧，集中兵力进攻我国的西部边境，连年侵犯京畿地区，以致几朝皇上都为此寝食不安。
从此得并力于西边，更无虞于南路。凭陵近甸，旰食累朝。
From then on, the Tibetans had no more concerns about the southern route and could concentrate their forces on attacking the western border of our country. They invaded the capital region year after year, so much so that several emperors could not sleep or eat in peace.
<s>[INST] Convert the following English text into Classical Chinese: From then on, the Tibetans had no more concerns about the southern route and could concentrate their forces on attacking the western border of our country. They invaded the capital region year after year, so much so that several emperors could not sleep or eat in peace. [/INST] 从此得并力于西边，更无虞于南路。凭陵近甸，旰食累朝。</s>
Convert the following English text into Classical Chinese: From then on, the Tibetans had no more concerns about the southern route and could concentrate their forces on attacking the western border of our country. They invaded the capital region year after year, so much so that several emperors could not sleep or eat in peace.
user
从此得并力于西边，更无虞于南路。凭陵近甸，旰食累朝。
assistant