Eastern Jewel moved to Shanghai and there first became involved with the Japanese military as an espionage agent were her Qing dynasty connections with the upper echelons of Chinese, Mongol and Manchu society proved invaluable. Throughout her life she suffered from something of an identity crisis but the one thing that never wavered was her devotion to monarchism; be it her loyalty to the Emperor of Japan or her zeal to see the restoration of the Qing Imperial Dynasty of which she was a member. The last Emperor of China was her cousin and always welcomed her at his court-in-exile. She played a major role in persuading the last Emperor to go with the Japanese to Manchuria to establish the new monarchy of Manchukuo.
When open warfare broke out again between the Chinese and Japanese, Eastern Jewel, then going by the name of Kam Bik Fai, became an officer in the Manchukuo Imperial military and formed and led her own anti-guerilla cavalry force known as the Anguo Army. As she cleared bandits and red guerillas out of Manchuria, Eastern Jewel became a media sensation in Japan where she was known as the "Joan of Arc of Manchukuo". However, the media attention all but ruined her chances to return to the spy game which was a problem following her being wounded and unable to remain with her army. She opened a resteraunt in Tientsin as a front for Japanese espionage work and she was still there when the war ended and Japan surrendered. She tried to return to Japan but was captured by the Chinese republican forces and executed in 1948.