蔡倫
In 82, an opportunity came for Empress Dou. The elder Consort Song had become ill, and in her illness, she craved raw cuscuta, and she requested that her family bring them. Empress Dou seized the cuscuta and falsely accused Consort Song of using it for witchcraft. Emperor Zhang was enraged and expelled Crown Prince Qing from the palace. He had the Consorts Song arrested and interrogated by the eunuch Cai Lun. Consorts Song saw that they were in deep straits, and they committed suicide by poison. Crown Prince Qing was deposed and created the Prince of Qinghe instead; he was replaced by Prince Zhao as crown prince. Prince Zhao, however, was friendly to his brother, and they often spent time together.