Prince of Qin father Gaozu
Find the relation between <e1>Prince of Qin<\e1> and <e2>Gaozu<\e2>.
Li Jiancheng (; 589 – July 2, 626, formally Crown Prince Yin (, literally, " the hidden crown prince "), nickname Pishamen (; Sanskrit : Vaiśravaṇa), was the first crown prince of the Chinese dynasty Tang Dynasty. He was the oldest son of the founding emperor Emperor Gaozu (Li Yuan) and the crown prince after the founding of the dynasty in 618. Li Jiancheng was murdered by his younger brother, Li Shimin, the Prince of Qin during Xuanwu Gate indident in 626. All of Li Jiancheng's sons were executed and excluded from imperial clan. After Li Shimin took the throne, Li Jiancheng was posthumously created the Prince of Xi (息隐王). Later, he was buried with ceremonies due an imperial prince. In 642, Li Jiancheng's crown prince title was restored as the crown Prince of Yin (隐太子). 
Prince of Qin Gaozu