From Du Fu's (
杜甫, Tang dynasty)
《春望》:
国破山河在,城春草木深。感时花溅泪,恨别鸟惊心。烽火连三月,家书抵万金 - 'The state is shattered, mountains and rivers remain; in the city's spring, grass and trees grow deep... Beacon fires have burned for three months; a letter from home is worth ten thousand in gold.' Written in 757 during the An Lushan Rebellion while Du Fu was trapped in occupied Chang'an.