编辑同志: 读《江苏商论》第三期叶锋同志所撰《为有源头活水来》文章中所引宋·朱熹的诗一首。首句“半亩方塘许鉴开”的“许”字应为“一”字。按旧体诗的格律此诗属七绝,其文字要求非常严格,在全诗二十八个字中一般不允许出现重复的字,而此诗出现了两个“许”字。不知对否,供参考。致以敬礼! Editorial comrades: read “Jiangsu Business Theory” Comrade Ye Feng, the third period Comrade wrote “for the first time to live in water,” the article cited Song Zhu Xi poem first. The first sentence of “half acre square Xu Jian Kai” “Xu” word should be “a” word. According to the rhythm of the old poem, this poem belongs to Qijue, its writing requirements are very strict. In the whole poem twenty-eight words, repetitive words are generally not allowed, and there are two “Xu” characters in this poem. I do not know whether or not, for reference. Salute!