纸上谈兵
zhǐshàng-tánbīng
lit. military tactics on paper, fig. theoretical discussion that is worse than useless in practice
HSK 79
Traditional紙上談兵
Additional Dictionary Meanings
lit. military tactics on paper (idiom)fig. theoretical discussion that is worse than useless in practicearmchair strategistidle theorizingcf Zhao Kuo 趙括|赵括[Zhao4 Kuo4] leading an army of 400,000 to total annihilation at battle of Changping 長平之戰|长平之战[Chang2 ping2 zhi1 Zhan4] in 260 BC