Zhao Kuangyin and Zhao Guangyi are brothers. Zhao Guangyi's original name was Zhao Kuangyi. He changed his name to Guangyi because Zhao Kuangyin avoided taboos after he became emperor. Zhao Kuangyin was Song Taizu, but he did not pass the throne to his son. Zhao Guangyi succeeded Zhao Kuangyin to the throne as Song Taizong. Records say that one day Zhao Kuangyin invited Zhao Guangyi to the palace for drinking, and he stayed in the palace that night. Zhao Kuangyin suddenly died the next day, and Zhao Guangyi succeeded to the throne. There are rumors of candlelight and ax shadow.
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