C919 Bring the Two Girls down the Valley

Shen Xin asked instead, "Little Jun, we've been looking for you for a long time. You've lost all your books when you were in school. There was only one exercise book left. And there were also some formulas written on it that could not be understood. So, I think that your grandmother has a high chance of leaving behind the secret recipe for planting a big watermelon in this exercise book