天下

land under heaven / the whole world / the whole of China / realm / rule

day / sky / heaven

down / downwards / below / lower / later / next (week etc) / second (of two parts) / to decline / to go down / to arrive at (a decision, conclusion etc) / measure word to show the frequency of an action

the whole world at peace (idiom); peace and prosperity

world famous

see 冒大不韙|冒大不韪[mao4 da4 bu4 wei3]

to wish for the whole world to be in chaos (idiom)

the whole country in rebellion

see 天下沒有不散的筵席|天下没有不散的筵席[tian1 xia4 mei2 you3 bu4 san4 de5 yan2 xi2]

all crows are black (idiom) / evil people are bad all over the world

there is nothing the determined person can't accomplish (idiom) / persistence will overcome

The rise and fall of the nation concerns everyone (idiom). Everyone bears responsibility for the prosperity of society.

The first concern is affairs of state, enjoying the pleasure comes later. Quotation from essay On Yueyang Tower 岳陽樓記|岳阳楼记 by Song writer Fan Zhongyan 范仲淹[Fan4 Zhong4 yan1]

to make everyone's lives better

to run everything (idiom); to monopolize the whole business / not allow anyone else to have a look in