The Guanlong clique seemed to have enjoyed significant advantages in dynastic continuity from the Western Wei to the Tang. The majority of the former officials of Taiyuan however had nothing to do with the Guanlong clique in terms of their family and regional backgrounds. Those collaborating with Li Yuan in overthrowing the Sui dynasty had typically shown their hatred and disappointment of the regime and some of them were even desperados not tolerated by the establishments. Drawing on local talents was also a policy adopted by Li Yuan to strengthen his anti-establishment ability. Another focus of this paper is to examine the impact and changes experienced by the Guan long clique during the Sui dynasty. Yang Jian and Yang Guang had already made use of the forces alienated by the regime to attack the establishments. In this process, members of the Guan long clique did not enjoy privileges; rather they became the target of persecution and purging. Such historical events indicate the inadequacy caused by applying the viewpoint that the continuity of the Guanlong clique was the reason for the Tang dynasty's founding.