sentences:  In 639, he was made the deputy head of the examination bureau, and he was given the additional bestowment of "Canzhi Zhengshi" (), making him, while not titularly a chancellor, a "de facto" one.It was said that Liu was blunt in his actions and words.During an imperial feast, when Emperor Taizong, playing with his officials, wrote some calligraphy and held it out to give to an official, Liu bypassed everyone by climbing up onto the imperial seat and grabbing it from Emperor Taizong.