A: What is this? B: This is my dad’s map. A: What map is this? B: This is a map of the World. A: What country’s map is that? B: That is a map of China. Look! This is Beijing, and that is Shanghai. A: Is this the Great Wall. B: (You are) right. A: The Great Wall is really long. What is that? B: That is Yellow River. A: What river is this? B: This is Yangtz River.