Establish and change of Northern Jimifuzhou during the former part of Tang

This article divided the period into four parts according to the establishments of Jimifuzhou and its changing aspects. This article mainly examined how Tang Dynasty established the Jimifuzhou system and preserved it. The characteristics of each part are as follows. First, it is a foundation period from 630 to 646 and Jimifuzhou was first introduced. Tang dynasty first established five Jimifuzhou in 630. Jimifuzhou in the north had regular autonomy and it was controlled administratively. Also, Jimifuzhou was under high-handed control as it had to be burdened with a tax and defend the northern frontier. The second period is from 647 to 678 when the Jimifuzhou system in the north was settled. At this period, Jimifuzhou was established to the northern part of the Gobi Deser, and Protectorate General was established to control Jimifuzhou. Tang Dynasty split other people's villages into pieces through Jimifuzhou just as they intended, and the system established at this time was employed for a relatively long period. Third, it is a period of contraction from 679 to 720 At this period, the range of Jimifuzhou in the north was reduced according to the foreign situation. Also, its role was cut back as it did not work properly according to its existing rules. About this, Tang was flexible in responding to the complicated situation of the north Jimifuzhou. Fourth, it is a period of reestablishment from 721 to 755. At this period, Shuocfangjiedushi exercised administrative control over Jimifuzhou within the district of jurisdiction as held the additional office of Yafanshi in 728. It meant that Tang used the Jimi system through Jiedushi with the military force and administrative power. To summarize, Jimifuzhou in the north had autonomy but it was under administrative control of Tang dynasty. Moreover, Jimifuzhou was coercively controlled by Tang Dynasty with some actions. However, the role of Jimifuzhou was reduced according to the situation of the north, so Tang needed to control Jimifuzhou more physically. As a result, Jimifuzhou in the north lost autonomy