37.赔了夫人又折兵 throw good money after bad
38.抛砖引玉 a modest spur to induce others to come forward with valuable contributions; throw a sprat to catch a whale
39.破釜沉舟 cut off all means of retreat；burn one‘s own way of retreat and be determined to fight to the end
40.抢得先机 take the preemptive opportunities
41.巧妇难为无米之炊 If you have no hand you can't make a fist. One can't make bricks without straw.
42.千里之行始于足下 a thousand-li journey begins with the first step--the highest eminence is to be gained step by step
43.前事不忘后事之师 Past experience, if not forgotten, is a guide for the future.
44.前人栽树后人乘凉 One generation plants the trees in whose shade another generation rests.One sows and another reaps.
45.前怕狼后怕虎 fear the wolf in front and the tiger behind hesitate in doing something
46.强龙难压地头蛇 Even a dragon (from the outside) finds it hard to control a snake in its old haunt - Powerful outsiders can hardly afford to neglect local bullies.
47.强强联手 win-win co-operation
48.瑞雪兆丰年 A timely snow promises a good harvest.
49.人之初性本善 Man's nature at birth is good.
50.人逢喜事精神爽 Joy puts heart into a man.