Fan Xian's zhenqi exploded and he sat in a wheelchair.

Fan Xian sat in the wheelchair because his zhenqi had disappeared. The specific reasons and details were not mentioned in the search results provided.

Fan Xian sat in the wheelchair because his zhenqi had disappeared. The specific reasons and details were not mentioned in the search results provided.

Fan Xian sat in the wheelchair because his zhenqi had disappeared. The specific reasons and details were not mentioned in the search results provided.

Fan Xian sat in the wheelchair because his zhenqi had disappeared. The specific reasons and details were not mentioned in the search results provided.

Fan Xian's zhenqi explosion might have been because he had encountered difficulties and challenges in the process of practicing Tyrannical zhenqi. Cultivating Tyrannical zhenqi required one to experience a series of trials and dangers, including the bursting of meridians and the loss of control of zhenqi. During the assassination in the Hanging Temple, Fan Xian's zhenqi explosion had almost killed him. Fan Xian had later recovered his zhenqi through surgery, but this life-and-death test had caused him to lose the chance to become a Great Grandmaster. Fan Xian's zhenqi was unstable. This outburst might have been because he was unable to control it.

Fan Xian was in the wheelchair because he had been injured while on a mission, causing his lower body to be paralyzed. Chen Pingping was the Qing Emperor's eunuch. He had followed and served the Qing Emperor since he was young. He had once led the Black Knights on a thousand-mile raid and successfully captured Northern Qi's number one demon, Xiao En. However, he had been injured in this battle and could no longer walk. Fan Xian had sat in a wheelchair in both the original work and the play of " Celebrating Years." The specific reasons and details were not mentioned in the search results provided.

Fan Xian was in the wheelchair because he had been injured while on a mission, causing his lower body to be paralyzed. Chen Pingping was the Qing Emperor's eunuch. He had followed and served the Qing Emperor since he was young. He had once led the Black Knights on a thousand-mile raid and successfully captured Northern Qi's number one demon, Xiao En. However, he had been injured in this battle and could no longer walk. Fan Xian had also sat in a wheelchair in the original book of " Celebrating Years." After the Qing Emperor was injured, his meridians were all broken. Chen Pingping had lost his legs to protect him, so he could only rely on a wheelchair to travel. Therefore, Fan Xian sitting in a wheelchair was a fact of the plot.

Fan Xian's mother mentioned in the letter that there was no zhenqi in the world. She explained that the so-called true energy was actually traces of nuclear radiation left behind by the nuclear war of the previous era. Fan Xian was confused about this because the Tyrannical zhenqi he practiced did not seem to match what his mother had written. According to the letter, the Tyrannical zhenqi manual was actually developed from the AI of an intelligent computer in a military museum. It was the human body's application of radiation. Thus, Fan Xian's mother believed that there was no true zhenqi in the world, but a product of science.

Fan Xian's zhenqi was a type of martial arts known as " Tyrannical zhenqi." It was a zhenqi that pointed directly at a Great Grandmaster. By practicing this zhenqi, Fan Xian stored zhenqi in the flesh and blood of his entire body, not in his meridians, causing the zhenqi capacity in his body to be dozens of times that of others. However, Fan Xian's zhenqi cultivation had a certain risk. Because the zhenqi was too overbearing, it could cause his meridians to explode. In the later stages, Fan Xian had comprehended Sigu Jian's nature of the sword and touched the threshold of a Great Grandmaster. Fan Xian's zhenqi had a sense of invasion. The evidence showed that it had the fire attribute. In addition, Fan Xian's mother mentioned in the letter that there was no zhenqi in the world. The so-called zhenqi was actually traces of nuclear radiation left behind by the nuclear war of the previous era. Therefore, there was still a certain amount of debate and confusion about what Fan Xian's zhenqi was.

Fan Xian's zhenqi returned. In the novel " Celebrating Years," Fan Xian had successfully recovered his zhenqi through practicing Tianyi Dao's mental cultivation technique and the help of Haitang Duoduo. The details of the recovery of true qi were not mentioned in the search results provided. After Fan Xian was assassinated, he received treatment from Haitang Duoduo and recuperated for nearly a month. Fan Xian used medicine to calm his zhenqi and control its violent nature. Although the exact process of recovery was not mentioned, Fan Xian's zhenqi had indeed recovered.