In 593 he collected enough power to stop paying taxes to Emperor Wendi.
His wife Princess Qianjin secretly plotted with the khagan's rival Tuli (who claimed the throne in 593) to attack the Sui Empire when her husband refused to do so.
This plot was exposed by Chang sun-sheng, a spy of the Sui Empire.
Tulan Qaghan combined his forces with Tardu in 599 and launched an invasion on Sui, but he was assassinated by his own men in 599.
Her new name was given to her by the Sui Emperor Wendi in order to create a marriage alliance with the Turks.