Speaking as an old friend of Hsu's, Wu wrote in the letter, entitled "Elder Brother Hsu, It is time to bring the battle to a close," that Hsu should save his strength and work together with Peng to challenge the KMT nominees in the "battle of the century."
信中，他以老友身分呼籲許信良急流勇退，把「戰到最後一兵一卒」的能量保留下來，與彭明敏一起和國民黨的總統候選人進行一場「世紀之戰」。