Initially, Trần Liễu was honoured by his younger brother with the title King Hiển (Vietnamese: Hiển Hoàng) but he was downgraded to Prince Yên Sinh after the short-lived revolt in fury of losing his pregnant wife, Princess Thuận Thiên, to the Emperor under the pressure of Imperial Regent Trần Thủ Độ.
[9] According to Đại Việt sử kí toàn thư, Thái Tông and his wife the Empress Chiêu Thánh did not have their first son for a while, this situation in the royal family made grand chancellor Trần Thủ Độ worried because he had profited the same circumstance of the Emperor Lý Huệ Tông to overthrow the Lý dynasty.
After the royal marriage, Thuận Thiên was entitled the new empress of the Trần dynasty while Chiêu Thánh was downgraded to princess.
In the fury of losing his pregnant wife, Trần Liễu rose a revolt against the royal family, meanwhile, Thái Tông felt awkward about the situation and decided to become a monk in Yên Tử Mountain.
The first was Princess Thuận Thiên whom Trần Liễu was forced to give up for his brother Thái Tông.