bì lù lán lóu
筚路:柴车。坐着柴车,穿着破衣服,去开辟山林。形容创业的艰苦
西汉·司马迁《史记·楚世家》:“荜路蓝蒌,以处草莽。”
作谓语、定语、状语;用于书面语
ride on a faggot wickerwork cart in ragged clothes--start one's career from humble origins