Qingdao is a beautiful coastal city that has made countless tourists yearn for love. Although the city is only around 100 years, it has become one of the most famous and historical cultural cities in China. It has the reputation of being the Switzerland of the Orient. There are many old buildings in Qingdao. Together with the red tiles of the buildings, the blue sea and the blue sky, they have become one of the most distinct and beautiful places in Qingdao.  In fact, most of these old buildings were left by Germany and Japan during the occupation of Qingdao and have a profound cultural heritage. Walking into Signal Hill Park, you can see a lot of plaques hanging on the wall at the entrance. One of them is the "social classroom". This one was very attractive to me. Signal Hill a good place to see the flowers. It is a good place to witness the development of Qingdao. Qingdao was once the only battlefield in Asia during the First World War.