Know the earth and the sky
Knowing the earth and the sky, pronunciation zh ī D ì zh ī Ti ā n, Chinese idiom, understand the terrain, understand the climate. From Sun Tzu: terrain.
explain
Land: Terrain: Day: weather. Understand the terrain, understand the climate.
source
Sun Tzu's terrain: "if you know your enemy and friend, you will not win; if you know heaven and earth, you will win."
Discrimination of words
Grammar: used as predicate and object; used in written language
Know the earth and the sky
Catch the thief and see the stolen goods - zhuō zéi jiàn zāng
be toughened and hardened into steel - bǎi liàn chéng gāng