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