《新唐书·列传·卷四十八》
且朝廷日常事务，并非无事。麻烦需处理之事，常在四方。所以出京处理事务的连续不断。
且朝廷万机非无事，而机事之动，常在四方，故出使者冠盖相望。
Furthermore, the daily affairs of the court are not insignificant. Matters needing attention often arise all over the country. So officials continuously travel out of the capital to deal with matters.