Literally, it is hiding in the sky and sneaking into the sea. Metaphor uses lies and disguises to hide one's true intentions from others and act in secret. In the Qing dynasty, the anonymous person included "crossing the sea from heaven" in his "thirty-six plans" and took it as the first of the "thirty-six plans" In ancient times, people used the tactic of "crossing the sea by hiding from the sky", and the formation of the word "crossing the sea by hiding from the sky" was related to the story that Xue designed Tang Taizong to cross the sea in Xue Zheng Liao lue written by an unknown person in the early Yuan Dynasty. The word "crossing the sea without telling the truth" was first used no later than the end of the Ming Dynasty.
2, wai Wei to save Zhao
Encircling the state of Wei to save Zhao is a brilliant plan among the 36 schemes. Its genius lies in that it bypasses the superficial phenomenon of the problem and solves the problem from the source of things in the way of reverse thinking, thus achieving a magical effect of winning. From Historical Records, Volume 65, Biography of Sun Tzu Wuqi.
3, impeded
Metaphor is that you don't come forward and borrow others' hands to harm others. During the Three Kingdoms period, when Kongming died, Wei Yan had a dream in the army that he could be king, so he was dissatisfied with Kongming's arrangement. He and Ma Dai rose up and attacked Yang Yi, who saw Kong Ming's sleeve and cursed Wei Yan for "Who dares to kill me". Wei Yan shouted that Ma Dai killed Wei Yan in the back, which was arranged by Kong Ming before his death. This so-called impeded.