In a Constricted Ground-Sun Zi

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In a Constricted Ground by Sun Zi

English: On a constricted ground, must be the first to occupy it; one should then fortify the strategic access points with one’s troops and await the arrival of the enemy. If the enemy occupies the constricted ground first and has already fortified the strategic access points, refrain from attacking him. Only attack the strategic access point when they are weak and not fortified.

Modern: 在隘形地域，若我方先占领，应当用重兵占领隘口；若敌人先占领，并以重兵把守隘口，不可攻击，若没重兵把守，就因该迅速攻击隘口。

Original: 隘形者，我先居之，必盈之以待敌；若敌先居之，盈而勿从，不盈而从之。

Business Application:

From: Sun Zi Art of War Chapter 10