there was a man called guo han in the tang dynasty(618-907).

one summer night, when the moon was very bright he suddenly saw a girl descending（下降） slowly from the sky. he observed the girl closely, and found that the dress she was wearing was seamless（无缝的） . he was puzzled, and asked why. the girl answered,"heavenly clothes are not sewn with needle and thread."

传说古代太原人郭翰在夏夜里乘凉，见一个仙女从天上下来，她身穿白衣，美丽绝伦。她告诉他她名叫织女。郭翰仔细欣赏织女的衣裳浑然一体，竟看不出一丝线缝，好奇问织女。织女答道："天衣本非针线为也。"

this idiom is used metaphorically to indicate the flawless handling of things. it can also be used to indicate a perfectly written poem or other literary article.
神话传说，仙女的衣服没有衣缝。比喻事物周密完善，找不出什么毛病。

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作文地带知识拓展:

• 中国，读作zhōng guó。古代华夏族（即汉族前身）建国于黄河流域一带，以为居天下之中，故称中国。后成为我国的专称，全称中华人民共和国，首都北京。

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