Yangyang took his grandfather and found No. 25 Baiyun Street. 

Yangyang's house is nearby. 

It used to be grassland and the environment is very good. 

There are now three-story new houses on the lawn. 

Yangyang and grandpa take the stairs. When walk to the third floor, Xiaoxi opened the door and came out. 

She shouted happily: "Grandpa, you are here!" Grandpa said: "Your father told me that you have moved. Let me come and take a look." 

 Yangyang just  knows that this is Xiaoxi's grandfather, and this is Xiaoxi's new home.