Yu, alias Wei, was born in the street shed of Neijiang County, 1889. 1905 He went to Japan to study with his brother Yu Peilun, and studied in Japan Police Commissioner School and Jingwei School successively. 1908, Huang Xing launched an armed uprising in Hekou. At that time, he was studying in a military school in Yokohama, Japan, and was sent to participate in the uprising. In Annan, the Hekou uprising failed. I turned around and waited for a comeback. Due to the fatigue of running around, I got falciparum malaria and went to Singapore for treatment. Being in urgent need of expenses, I wrote to Wu, a revolutionary who works in Sichuan magazine, for help. Wu borrowed money from the electric instrument to collect 300 yuan's money and sent it to him.