In 1821, Gtsug-phudRnam-rgyal, the King of Sikkim, asked the ambans and the bka’-shag government to appoint an official position as the chief of phag-ri and reward the local people of gro-mo valley, which led to a dispute of the relationship between the Qing Dynasty and Sikkim. As a result, the ambans not only rejected the request from Sikkim, but also published a policy to restrain the king of Sikkim from going on pilgrimage to Tibet. Using historical materials in both Tibetan and Chinese, the paper did a textual research on the reason, details, and influence of this historical event. Sikkim’s repeated requests reflected his discontentment for the constant missing of the land which had been invaded and occupied by Gurkha, even after Qing’s army drove off Gurkha in 1792. He thought that his requests were reasonable in the background of the traditional relationship. But after the publishment of Zang Nei Shanhou Zhangcheng Ershijiu Tiao 藏內善后章程二十九條 the relative policy of the Qing dynasty had been changed. The Britain’s force began to intrude into this region when the ambans ignored Sikkim’s requests. Overall, during the early 19 th century, with Britain starting its colonial expansion towards the Himalayas, "the balance principle" of the Qing government had shown its defect.