债台高筑become debt-ridden

　　致命要害Achilles" heel

　　众矢之的target of public criticism

　　纸上谈兵be an armchair strategist

　　纸包不住火Truth will come to light sooner or later

　　知己知彼,百战不殆 Know the enemy and know yourself, and you can fight a hundred battles with no danger of defeat.

　　置之死地而后生 Put the troops in death ground and they will live.

　　智者不惑 A wise man is free from perplexities.

　　众志成城/团结就是力量 Union is strenth.

　　种瓜得瓜种豆得豆 You must reap what you have sown. / As you sow, so shall you reap.

　　转败为胜 to convert defeat into victory

　　转石不生苔 A rolling stone gathers no moss.

　　左右为难 between the devil and the deep blue sea; between the rock and the hard place