**

"The vibration frequency of Nokia E71 is 600 times per minute, and the fatal heart rate of congenital heart disease is 300 times per minute - and the probability of us meeting is a miracle of one in 1.7 Billion." In the late autumn of 2011, Cheng Ye, a gloomy mathematics genius, met transfer student Su Tang under the iron roof of the library. The hem of her aqua blue skirt was stained with wisteria petals, and half of the nail on the little finger of her left hand was missing, but she was able to stop the spasm of her right hand with a grape hard candy. When the electric sound of the old-fashioned tape recorder tore apart Cheng Ye's traumatic memories, Su Tang held his hand at the moment of the power outage and used a highlighter to draw beating function ripples on his plaster. He took the Nokia mobile phone left behind by his mother and calculated the probability of his father's violence in the shadow of 24 ghost text messages; she wore her school uniform as a painting robe, hid the quick-acting heart-saving pills in a medicine box full of cartoons, and secretly used a Sharp mobile phone to record his fluttering eyelashes while solving problems. They used 327 text messages to build a safe haven, encrypting each other's heartbeats in the key tone, until the New Year's Eve when the blizzard came - he lost the girl forever, and Su Tang's unsent confession was forever frozen in the draft box of the pink flip phone. When the old mobile phone that was repaired five years later lights up again, those text messages that were permanently lost due to damage to the memory card are like the broken rain lines on the top floor of the library when we first met. They obviously existed, but they can no longer be pieced together into a complete shape. This is the story of two damaged souls falling in love in the signal blind spot. All the unspoken sincerity turned into the lingering warmth on the snow. At the moment when the heart stopped, it shattered one in 1.7 Billion possibility.