Li Pei-chi joined the Revolutionary movement when still young and saw military service during the first Revolution at Wuhan in 1911. Later he became a chief-of-staff in the Commander-in-Chief's Headquarters of the Nationalist Revolutionary Army at Shanhaiguan. In 1916 he went to Shanxi and was appointed commander of a division by Yen Hsi-shan. Later, when Yen was in command of the Nationalist Revolutionary Army in North China, Mr. Li was appointed commander of the Northwest.
In April 1928 he carried on a successful campaign in Suiyuan province and as a reward he was promoted a General and appointed concurrently acting Tutung of Suiyuan and chairman of Suiyuan Provisional Government. Later Li Pei-chi was appointed member of the Hebei Provincial Government and his army was reorganized as the 2nd Central Division. Since 1929 Mr. Li served as a chairman of Suiyuan Provincial Government.