From the 《
战国策·
秦策五》:
诗云‘
行百里者半于九十。’
此言末路之难也 — 'The Odes say "of a hundred li, ninety is half" — this speaks of the hardness of the final stretch.' A classical warning that the closer you are to the goal, the harder the last bit becomes. Often invoked by Wen Jiabao and later leaders on reform.