sentences:  At a later point, when Cui served as assistant minister of census, there was a time when he was reporting a number of expenditures—more than 1,000 items—to Emperor Taizong, and he recited them without having his books with him.Emperor Taizong found this odd and unbelievable, and he had the assistant head of the examination bureau of government, Du Zhenglun, fetch the books, and then had Cui re-recite his expenditures.As it turned out, Cui's oral report was correct without flaw, and Emperor Taizong was impressed.