Among Taizong's many eunuchs, the highest-ranking and most trusted by Taizong was the Jurchen eunuch Wang Yan from the Shangbao Bureau. This person was personally given the name "Gou'er" by Taizong and made significant contributions during the Jingnan campaign. He not only managed the Shangbao Bureau but later became the first garrison eunuch, responsible for guarding the Capital Region's gate and the most important Liaodong Governor for thirty years! Besides him, there was also the Jurchen eunuch Liu Shun from the Imperial Stables, who accompanied Taizong on five expeditions to the Northern Desert and, after Emperor Renzong's death, personally welcomed Xuanzong Zhu Zhanji's accession, considered a double dragon's service.
