《晋书·列传·第九章》
惠帝回洛阳，王浚转任骠骑大将军、都督束夷河北诸军事，兼幽州刺史，用燕国增加博陵的封地。
惠帝旋洛阳，转浚骠骑大将军、都督东夷河北诸军事，领幽州刺史，以燕国增博陵之封。
When Emperor Hui returned to Luoyang, Wang Jun switched to the position of General of the Furious Cavalry, Grand Commander of the Military Forces of Shuxi Hebei, and part-time Governor of Youzhou. He also expanded the territory of Boling with Yannation.
<s>[INST] Kindly elucidate the central themes in this passage in English: 惠帝旋洛阳，转浚骠骑大将军、都督东夷河北诸军事，领幽州刺史，以燕国增博陵之封。 [/INST] When Emperor Hui returned to Luoyang, Wang Jun switched to the position of General of the Furious Cavalry, Grand Commander of the Military Forces of Shuxi Hebei, and part-time Governor of Youzhou. He also expanded the territory of Boling with Yannation.</s>
Kindly elucidate the central themes in this passage in English: 惠帝旋洛阳，转浚骠骑大将军、都督东夷河北诸军事，领幽州刺史，以燕国增博陵之封。
user
When Emperor Hui returned to Luoyang, Wang Jun switched to the position of General of the Furious Cavalry, Grand Commander of the Military Forces of Shuxi Hebei, and part-time Governor of Youzhou. He also expanded the territory of Boling with Yannation.
assistant