天险不可升也，地险山川丘陵也。王公设险以守其国，险之时用大矣哉。
释义：天之险在于高不可升，地之险在于山川丘陵。王公设险以保卫国家，险的功用非常大。
Collaboration is the key to solving the big challenges in food production today.
In business, if you're not moving forward, you're falling behind.