Living in the old city on April 14, I saw many historic buildings with a sense of age. The traces of time were stories. Even trams were still running. When I wandered in the street, I found many houses with "Zheng" on them. I wondered what would happen next time I came back. Now come to the old city and remember how it looks. Qingdao's dumplings are very delicious. They are delicious in any restaurant, tuna dumplings, squid dumplings, shrimp dumplings, three fresh dumplings, etc. The street names of Qingdao are very interesting. They are basically named by the names of 34 provincial administrative divisions and provincial capitals of China, and also by the cities of Shandong Province. There are few regional names. Why?