高句丽平原王当政时,前后期采用了截然不同的两种外交政策。前期面对宽松有利的外部环境,平原王一直奉行与各政权修好的外交策略;后期面对中原出现统一的隋政权,形势十分严峻之时,却率先打破几十年的和睦局面,主动挑衅。究其根本原因应该与高句丽内部形势变化息息相关。 When the Koguryo Plains reigned, two distinct foreign policies were adopted in the pre-and-post period. Faced with a liberal and favorable external environment in the early days, the plains Wang pursued a diplomatic strategy of repairing the regimes. When facing a unified regime of Sui regime in Central Plains in the latter part of the country, the situation was very harsh and the first to break the decades-long peace and take the initiative to provoke provocations. The root cause should be closely related to the changes in Goguryeo’s internal situation.