Ma Hongkui (traditional Chinese: ; simplified Chinese: ; pinyin: Ma Hongkui; WadeGiles: Ma Hung-k'uei; March 14 1892 1970) was a prominent warlord in China during the Republic of China era ruling the province of Ningxia. His rank was Lieutenant-general. His courtesy name was Shao-yun (). In 1950 Hongkui migrated to the United States where he lived till he died in 1970. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Office Holder