Lin Wan, who had been working overtime for three consecutive days, picked up a mobile phone on the last subway train. The screensaver is a blurred moon, and the caller ID reads "Mom."
The aunt on the other end of the phone was not in a hurry to ask for the mobile phone. Instead, she asked her to tell her son: The moon tonight has not been sent to me yet. It turns out that the owner of the mobile phone, Xu Yao, had an agreement with his mother who was far away in his hometown for two years - to take pictures of the moon and send them to each other every day, and to look at the same moon eight hundred kilometers away.
Lin Wan took the phone home and went back to the last bus the next day to wait for the owner. Two people who worked overtime until late at night in a strange city, because of a moon, a bowl of oden, and a remembered shelter seat, slowly transformed from reserved strangers into a tacit understanding of each other late at night.
On the day of the winter solstice, Xu Yao returned to his hometown with his suitcase, leaving behind an old mobile phone case with a moon sticker on it. Lin Wan finally raised her phone and sent tonight's moon to her mother and him at the same time - "The moon of this city is kept for you."
Two lonely urban migrant workers learned to live a good life again because of the kindness of a stranger.
