Li Jiancheng
Li Jiancheng was initially reduced to commoner rank. After Emperor Taizong took the throne, he posthumously granted Li Jiancheng the title of Prince of Xi and assigned his own son Li Fu (李福) into Li Jiancheng's lineage as Li Jiancheng's heir. He also buried Li Jiancheng with the ceremonies due to an imperial prince. In 642, he restored Li Jiancheng's crown prince title. However, Li Jiancheng was never fully rehabilitated and his daughters still had the status of daughters of a common prince, rather than a crown prince.