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Introduction：A teenager, Ai Jing Chu (Bi Wen Jun) accidentally receives Zeng Li's (Wu Xuan Yi) love letter to her first love, Yu Yi (Mire), and their love story begins. They have contacted and met again and again, from strangers to a phone call, from doctor-patient to lovers, they meet and get to know each other, two lonely hearts are longing for warmth, close to each other and heal each other... This drama will be streaming exclusively on iQIYI International (iQ.com).  #世界微尘里 #SweetTeeth #iQIYIOriginal #iQIYI青春剧场

Cast：Wu Xuanyi, Bi wenjun, Zhai Xiaowen

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