摘要
"The alarm comes at dawn/At night,we reinforce the Great Wall(朝来羽书急,夜救长城窟),"wrote the poet Zhangsun Zuofu(长孙佐辅)in the eighth century of the high-strung border defenses of the Great Tang cmpire(618-907).The character救,mcaning"rescue"or"save,"is formed by the radical求(qiu)meaning"to ask for"on its left side and the radical攵(pu),on the right,meaning"to tap."
