Generally speaking, there are the following explanations:

-Describe the superior geographical location and dangerous terrain. Such as "Xunzi Powerful Country": "It is dangerous and convenient, with beautiful mountains and valleys and rich natural products, it is also a victory."

-refers to a dangerous place. For example, "The History of the Ming Dynasty: The shape of the world is beyond my control, and then I will join the army."

-describe the magnificent mountains and rivers. For example, "Biography of Shu Wei": "Sejong gave him the strength to unite with the shamanism monks Siam and Yin Zhenchen in Henan Province. Zhou regarded Song as a brilliant hero, so he built a secluded Buddhist temple."

-Describe how to use the favorable situation to win. Sun Bin's Sun Tzu's Art of War, Zheng Qi, a bamboo slip in the Han Tomb, says, "Win by appearances. Shape can't win, you don't know the shape of victory. The change of shape wins, and the world is not poor. "