Mao had a younger brother, Mao Yingchu (Chinese: ), who was born in 1911. He had a similar military career as his older brother, becoming a pilot in the "Nationalist" Air Force of China and rising to the position of commanding officer of the 23rd Pursuit Squadron of 4th Pursuit Group of the Chinese Air Force by 1937. He saw combat at the Battle of Shanghai, Nanking, Wuhan, Xuzhou during the Second Sino-Japanese War, becoming an ace-fighter pilot. In June 1938, he married Zheng Xiuzhen, which whom he would later have two sons and two daughters. Later in the war, he served as an attaché at the Chinese embassy in Washington DC, United States. In 1946, he graduated from the US Staff and Command College at Fort Leavenworth, Kansas, United States. He retired from Republic of China Air Force service in 1968 at the rank of lieutenant general. Between 1969 and 1981, he was an official at the Civil Aviation Authority, and subsequently became the Chairman of the Board of the Hawley &amp; Hazel Chemical Company. He died in Taipei, Taiwan, in 2000.