Song Zheyuan, chairman of the Shaanxi Provincial Government, sympathized with the patriotic students and released Xi Zhongxun and other students.After returning home, his father Xi Zongde's health deteriorated and he passed away soon.In 1929, Shaanxi was hit by a disaster and the plague was rampant. Xi Zhongxun's mother also passed away that year. As the eldest son of the family, Xi Zhongxun shouldered the burden of taking care of his younger siblings.Liu Zhidan returned to northern Shaanxi and held a secret meeting with Xie Zichang and others, and decided to use the "Three Color Theory" to continue to develop revolutionary forces.In the spring of 1930, 17-year-old Xi Zhongxun was appointed by the organization to go to the Northwest People's Army stationed in Changwu to secretly carry out troop movement work.