Song Xiaolian, Cheng Duolu, Xu Nailin.
According to the Baidu Encyclopedia, the three heroes of Jilin are:
1. Song Xiaolian (1860-1926), whose courtesy name is Youmei. A native of Shuangyang County, Jilin Province, he was an outstanding patriot in modern China. He was good at poetry and calligraphy and was known as one of the "Three Heroes of Jilin".
2. Cheng Duolu (1864-1928) was born in Jilin. His original name was Enling, his courtesy name was Zhushan and his nickname was Dankan. He was a famous calligrapher. He is proficient in poetry, calligraphy, poems and manuscripts, and his ink has spread all over the three northeastern provinces. He is well-known throughout the country and is known as one of the "Three Heroes of Jilin".
3. Xu Nailin (1865-1940) was a gifted person in Yongji. He was proficient in poetry, calligraphy, and had high cultural and artistic achievements. He was named one of the "Three Heroes of Jilin".