Empress Ju was the wife and empress of Liu Wuzhou

Liu Wuzhou

Liu Wuzhou was a rebel leader who rose against the rule of the Chinese dynasty Sui Dynasty late in the dynasty's history, and he took imperial style -- although it was not completely clear whether the title he took was khan or tianzi...

, who rebelled against the rule of the Chinese

History of China

Chinese civilization originated in various regional centers along both the Yellow River and the Yangtze River valleys in the Neolithic era, but the Yellow River is said to be the Cradle of Chinese Civilization. With thousands of years of continuous history, China is one of the world's oldest...

 dynasty Sui Dynasty

Sui Dynasty

The Sui Dynasty was a powerful, but short-lived Imperial Chinese dynasty. Preceded by the Southern and Northern Dynasties, it ended nearly four centuries of division between rival regimes. It was followed by the Tang Dynasty....

 near Sui's end, taking imperial style himself.

Very little is known about Empress Ju—all that is clear is that after Liu took imperial title—either khan

Khan (title)

Khan is an originally Altaic and subsequently Central Asian title for a sovereign or military ruler, widely used by medieval nomadic Turko-Mongol tribes living to the north of China. 'Khan' is also seen as a title in the Xianbei confederation for their chief between 283 and 289...

 or tianzi

Tianzi

Tianzi may refer to:* Tianzi Mountain, a mountain in Hunan, China* Chinese sovereign, known as Tianzi, rulers of a particular period in ancient China...

-- in 617, he created her empress. It is not known whether she survived to his subsequent defeat in 620 at the hand of the Tang Dynasty

Tang Dynasty

The Tang Dynasty was an imperial dynasty of China preceded by the Sui Dynasty and followed by the Five Dynasties and Ten Kingdoms Period. It was founded by the Li family, who seized power during the decline and collapse of the Sui Empire...

 general Li Shimin

Emperor Taizong of Tang

Emperor Taizong of Tang , personal name Lǐ Shìmín , was the second emperor of the Tang Dynasty of China, ruling from 626 to 649...

, or his death, putatively in 622. (The below chart assumed that she survived to at least 620.)