China was then permitted to establish an office in Lhasa, staffed by the Mongolian and Tibetan Affairs Commission and headed by Wu Zhongxin (Wu Chung-hsin), the Commission's director of Tibetan Affairs, which Chinese sources claim was an administrative body—but the Tibetans claim that they rejected China's proposal that Tibet should be a part of China, and in turn demanded the return of territories east of the Drichu (Yangtze River).
Kina fik derefter lov til at etablere et kontor i Lhasa, bemandet af Kommissionen for mongolske og tibetanske anliggender og ledet af Wu Zhongxin (Wu Chung-hsin), Kommissionens direktør for tibetanske anliggender, hvilket kinesisk kilder hævder var et administrativt organ - men tibetanerne hævder, at de afviste Kinas forslag om, at Tibet skulle være en del af Kina, og på sin side krævede tilbagelevering af territorier øst for Drichu (Yangtze-floden).