原封不动 as is
Explanation
指完全按照原来的样子，一点也没有改变。
means that something is left completely unchanged, in its original state.
Origin Story
从前，有一个名叫小明的孩子，他非常喜欢收集邮票。他收到了一套珍贵的明信片，上面印着美丽的风景画和精美的图案，每张明信片都完好无损，邮票也贴得整整齐齐。小明小心翼翼地把这些明信片放在一个漂亮的盒子裡，并用丝带扎好，决心要原封不动地保存起来，将来留作纪念。时间一天天过去，小明长大了，成为了一个著名的画家。他回忆起儿时珍藏的明信片，仍然记得那份原封不动的美好记忆。他创作了许多以自然为主题的画作，并将这些画作作为礼物送给他的朋友和家人，希望他们也能感受到自然之美。而那些原封不动的明信片，则成为了他最珍贵的收藏，每当他看到它们，都会想起儿时那份单纯的快乐和对美好的向往。
Once upon a time, there was a boy named Xiaoming who loved collecting stamps. He received a set of precious postcards with beautiful landscape paintings and exquisite patterns. Each postcard was intact, and the stamps were neatly affixed. Xiaoming carefully placed these postcards in a beautiful box, tied it with a ribbon, and was determined to keep them as is for future memories. As time passed, Xiaoming grew up and became a famous painter. He recalled the precious postcards from his childhood, still remembering that pristine memory. He created many nature-themed paintings and gave them as gifts to his friends and family, hoping they would also feel the beauty of nature. Those original postcards remain his most precious collection, and whenever he sees them, he recalls the simple happiness of his childhood and his yearning for beauty.
Usage
用于形容事物保持原样，没有丝毫改变。
It is used to describe something that remains unchanged without the slightest alteration.
Examples
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这份文件，请你原封不动地交给他。
zhè fèn wénjiàn, qǐng nǐ yuánfēng bùdòng de jiāo gěi tā.
Please give him this document as is.
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他把收到的信原封不动地退回去了。
tā bǎ shōudào de xìn yuánfēng bùdòng de tuì huí qù le。
He returned the received letter as is without any change