維新帝
The efforts on the part of the French to raise the prince to support them largely failed. Nguyễn Phúc Vĩnh San was enthroned with the reign name of Duy Tân, meaning "friend of reform", but in time he proved incapable of living up to this name. As he became older he noticed that, even though he was treated as the emperor, it was the colonial authorities who were actually obeyed. As he became a teenager, Emperor Duy Tân came under the influence of the mandarin Trần Cao Vân, who was very much opposed to the colonial administration. Emperor Duy Tân began to plan a secret rebellion with Trần Cao Vân and others to overthrow the French.