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Li Hongtao invented the "brushless electric excitation motor" in prison. It is now electric cars, electric cars, and electromagnetic propulsion motors. In 1995, he won the gold medal at the 5th China Patent and Invention Expo.
The reason why Li Hongtao is called "the most awesome death row prisoner" is not only because of Li Hongtao's intelligence, but also because he used his intelligence in the right place and made contributions to the motherland with his own performance. Obtained a reduced sentence and released after serving his sentence.