昌邑國與山陽郡瑣議——讀《中國行政區劃通史‧秦漢卷（上）》札記

Trivial Comment on Chang-Yi Vassal State and Shanyang Prefecture—Notes on reading of A Comprehensive History of Administrative Divisions in China: Qin-Han Volume ( Part 1)

《中國行政區劃通史‧秦漢卷（上）》對山陽郡沿革有簡要說明，內容仍可進一步補充。
王國人不戍邊問題，書中認為是漢初之制，景武以後方戍邊。臧知非則認為是漢初之制，二者之間尚有討論空間。據三枚有年號昌邑國簡知最遲在漢武帝晚期王國人戍邊即已存在，由此推論王國人戍邊最早時間雖尚難考察，但將之定景武以後，是可接受的。
山陽郡領縣在西漢共有31個縣及侯國。根據漢簡及傳世文獻推估，昌邑國時期應轄有14縣。

The book A Comprehensive History of Administrative Divisions in China: Qin-Han Volume (Part 1) provides a brief overview of the evolution of Shanyang Prefecture（山陽郡）, the detail needs further supplementation.
Regarding the issue of the Vassal State people not serve to station on the borders, the text suggests it was the regulation during the early Han Dynasty, while frontier garrisons were established after the Jing & Wu（景武）era. However, Zang Zhifei（臧知非）argues that it was indeed the regulation during the early Han Dynasty, and there remains debate between these viewpoints.
According to 3 pieces Chang-Yi Vassal State（昌邑國）Bamboo slips annotated with reign years inscriptions, Vassal State people were already stationed on the borders during the late reign of Emperor Han-Wu（漢武帝）. From this, it can be inferred that while the exact earliest time when Vassal State people were stationed on the borders is difficult to ascertain, placing it after the Jing & Wu（景武）era is acceptable.
During the Western Han Dynasty, Shanyang Prefecture administered a total of 31 counties and marquisates. Based on Han dynasty documents and transmitted texts, it is estimated that during the reign of Chang-Yi Vassal State, it administered approximately 14 counties.