Haichen, Sun. The Wiles Of War: 36 Military Strategies from Ancient China. China Books and Periodicals, January 1993.

Among the 36 military strategies of ancient China exists the principle that “no deception is too much.” This mentality may account for the all-too-common practice in China of packaging hazardous substances labeled and sold as medicine. Due to this danger, one must be wary of purchasing “herbal” formulas made in China.