Xu Tian, a 21-year-old youth, followed the faith and instructions of his father and set out from Nanyang to Guangdong, passing through Fujian, Jiangxi, Zhejiang, and finally arriving in Shanghai, where he successfully delivered the materials to support the revolution to the Communist International. After experiencing the ups and downs and setbacks along the way with Lao Sun, Yu Yixiu, Zhang Jiayi and others, Xu Tian completed the tempering of life and the delivery of his mission. The smiles on everyone's faces were a firm belief and beautiful hope that the revolution would win.