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At that time, the technology of automatic control motor was still immature. If the corresponding technology can be developed, it will be of great help to many scientific research and medical undertakings in China. Li Hongtao officially started the experimental research and development of brushless motor in prison. Because Li Hongtao was really smart, the director of the detention center knew his experience and allowed him to do experiments in prison. The director of the detention center was moved by Li Hongtao's scientific research spirit, hoping that he could develop a brushless motor to benefit the society, and invited experts from Yunnan Electric Appliance Research Institute to help him with the experiment. Finally, the day before Li Hongtao was executed, it was successfully made? Brushless electric excitation motor? After the director learned of this incident, he reported to the Public Security Bureau overnight, hoping to temporarily stop execution. After the approval of the court, he was immediately given a two-year suspended sentence. If he can further innovate technology in the past two years, he can reduce his sentence on the original basis.