筚路蓝缕：出自《左传·宣公十二年》：“筚路蓝缕，以启山林。”驾着简陋的柴车，穿着破烂的衣服去开辟山林道路。形容创业的艰苦。筚路蓝缕（bì lù lán lǚ ）：筚路：柴车；蓝缕：破衣服。也作“荜路褴褛”。
This Chinese idiom means that it is very hard of doing a pioneering work. This idiom is quoted from The Twelfth Year of Xuangong, The Commentary of Zuo, and means wearing old clothes and driving firewood carriages to assart mountain forests and to be industrious and thrifty in managing a country and arduous pioneering.
