Li Jing (570-649 AD), Tang Dynasty general and purported author of "Duke Li of Wei Answering Emperor Taizong of Tang" 唐太宗李卫公问对 Táng Tàizōng Lǐ Wèi Gōng Wènduì, one of the Seven Military Classics of ancient China 武经七书 Wǔjīng Qīshū