Xiao Baojuan (蕭寶卷) (483 – 31 December 501[2]), né Xiao Mingxian (蕭明賢), commonly known by his posthumously demoted title of Marquess of Donghun[3] (東昏侯), courtesy name Zhizang (智藏), was an emperor of the Southern Qi dynasty of China, during the Northern and Southern dynasties period.

He is known as the Marquess of Donghun because Xiao Yan demoted him to that title after he was killed in a siege of the capital Jiankang.

What is known was that Emperor Ming often told him about how Xiao Zhaoye had considered killing him, and warning him that he needed to act decisively.

Xiao Baojuan himself was anxious to exercise imperial authority, but often spent his time in games with his close associates, whom he often awarded money.

With the young emperor's lack of virtues becoming evident, Jiang Shi began a discussion among high-level officials to depose him and to replace him with his younger brother Xiao Baoxuan the Prince of Jiangxia.

Soon, the same fate fell Liu and Cao, and from this point on, the entire government was in fear, not knowing whom the emperor would next kill.

Upon hearing how Xiao Baojuan was slaughtering the high-level officials, the senior general Chen Xianda (陳顯達), then the governor of Jiang Province (江州, modern Jiangxi and Fujian), started a rebellion, advancing quickly on Jiankang and reaching the outskirts of the capital in less than a month, around new year 500.

In spring 500, in fear, the general Pei Zhaoye (裴叔業), the governor of Yu Province (豫州, modern central Anhui), surrendered the important city Shouyang to rival Northern Wei.

Xiao Yi advanced quickly back on the capital and defeated Cui, who fled but was killed during flight.

After Cui's death, Xiao Baojuan grew even more confident, and his associates quickly controlled the government.

Xiao Yan's progress was not fast but was steady, and by spring 501 the western half of the empire was under the control of his forces.

By winter 501, Xiao Yan had reached Jiankang and put the city under siege, but while he was initially successful in defeating Xiao Baojuan's forces, the city was initially ably defended by the generals Wang Zhenguo (王珍國) and Zhang Ji (張稷), and the siege stalled.

Consort Pan and his other associates were executed, and Empress Chu and Crown Prince Song were both demoted to commoner rank.