筚 ㄅㄧ ˋ bì 路 ㄌㄨ ˋ lù 蓝 ㄌㄢ ˊ lán 缕 ㄌㄩ ˇ lǚ 篳 ㄅㄧ ˋ bì 路 ㄌㄨ ˋ lù 藍 ㄌㄢ ˊ lán 縷 ㄌㄩ ˇ lǚ the hardships of beginning an undertaking (idiom)