Yun's book claims both extreme persecutions and miracles of deliverance similar to ones found in the Bible. Despite a life of poverty in China, he since has spoken to thousands internationally, possibly millions, with the gospel message. Seen as a rebel among some Chinese for not joining the 'official' government-controlled Christian organization (see: Three-Self Patriotic Movement), he was imprisoned and tortured by the government authorities. His book claims that he became a highly wanted man across several provinces. He was finally arrested and sentenced to many years in prison. However, Yun continued his ministry while in prison, with more miraculous results. As a result, many prisoners and even some prison officials became born-again Christians. While he gained increasing favor from some officials, he also became a target of increased persecutions by others. He was repeatedly beaten and became severely malnourished. While in prison, Yun writes about undertaking a total fast without food or water for 74 days.
After many years in prison, he escaped from Zhengzhou Maximum Security prison from which it is reported that nobody had previously escaped. He described how he heard the voice of the Holy Spirit, telling him to simply walk out the heavily guarded prison gate. Risking being shot to death on the spot, he wrote later that he obeyed the voice, and walked straight through several prison doors that were somehow left open in front of many prison guards, across the prison yard and finally out of the main gate. Yun stated that it was as if he had become invisible to the guards who stared straight through him. Although many expressed doubts that such a thing could happen, some prison guards had lost their jobs for this 'embarrassing mishap.' It is reported that the official investigation by the Chinese Government concluded that "Yun received no human help in his escape." These reports have been also confirmed by numerous prisoners who occupied the same prison cell as Yun. He remains the only person to have escaped from this notorious maximum security prison.