Huynh Phu So was the founder of a nationalist movement called Hoa Hao. He performed miracles and helped the poor. His criticism against useless expenditure had a wide appeal. He also opposed the sale of child brides, gambling and the use of alcohol and opium. The French tried to suppress the movement inspired by Huynh Phu So. They declared him mad, called him the Mad Bonze, and put him in a mental asylum. But the doctor, who had to prove him mad, became his follower. Finally, he was exiled to Laos and many of his followers were sent to concentration camps.