Liu Qing (Chinese: 劉慶; 78–106), formally Prince Xiao of Qinghe (清河孝王) or Emperor Xiaode (孝德皇), was a crown prince of the Han dynasty under his father Emperor Zhang who lost his position and his mother Consort Song due to palace intrigue at the hands of his father's wife Empress Dou. He, however, maintained a strong relationship with his brother Emperor He, and was able to avenge himself and his mother in conjunction with his brother. During his lifetime, he saw his son Liu Hu (劉祜) become emperor (as Emperor An) as successor to his nephew Emperor Shang, who died in infancy.
Liu Qing was born to Emperor Zhang and Consort Song, then one of Emperor Zhang's favorites and also a favorite of Emperor Zhang's mother Empress Dowager Ma, in 78. As Emperor Zhang's wife Empress Dou was sonless, Prince Qing was created crown prince in 79, while still in infancy.
Empress Dou was not satisfied with the situation, however, and in 79, after another imperial consort, Consort Liang, gave birth to a son named Liu Zhao (劉肇), she adopted Prince Zhao and intended to make him crown prince instead. After Empress Dowager Ma died later that year, Consort Song was left without anyone to protect her, and Empress Dou began to plot her destruction.
In 82, an opportunity came for Empress Dou. 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 Consort Song and her sister, also an imperial consort, arrested and interrogated by the eunuch Cai Lun. Consort Song and her sister 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.