When the summer vacation was coming soon, the primary school student picked up a big stone on his way home from school. He took the stone home, but as soon as he washed it with water, a small river boy jumped out of it. Xiao he Tong called out to him "goo", so Kang Yi named it "Xiao goo". Xiao Gu can speak human language. He has been buried in the ground for hundreds of years. Kang Yi and Xiao Gu soon became good friends. They bathed, ate and slept together. And other family members also accepted Xiao Gu, and Xiaohetong became the secret of the Shangyuan family. One day, Xiao Gu suggested that he wanted to go home with his friends. In order to let Xiao Gu understand the outside world, Kangyi quietly took it out. Xiao Gu was surprised to find that the environment had changed beyond recognition. There was no partner in this place that was not suitable for the survival of river children. Seeing Xiao Gu sad, Kang Yi didn't feel good either. He traveled with Xiao Gu and came to Yuano Prefecture, where the legend of the river boy is still preserved. The two found a suitable place for the river boy to live in the beautiful nature, Xiao Gu swam happily in the clear river, and Kangyi was also happy for it. However, I can't find any other river children here. Kang heard the villagers say, "you can get a thousand if you catch a river boy."