The German tour was originally planned to go directly from Cologne to Bauhaus in Dessau and then return to Beijing via Berlin. Unexpectedly, there are many things to see in Berlin when searching online. In just three days, I saw the Einstein Observatory, the Capitol Building, the New National Gallery of Art in Berlin and Sentinel Charlie. After returning to Beijing, I learnt from a large number of materials that there are many buildings in Berlin that need to be visited. Almost all the masters have their works in this city.