Why are all the roads in Qingdao city names?

Qingdao was once invaded by imperialism, and in the process of being ruled by Germany, many German names were produced, such as Berlin Street and Hamburg Street. Later, after the return of Qingdao, the original place names were abolished, and the place names all over the country were used as road names, from which the famous urban roads in Qingdao came. Like Qingdao, many roads in Shanghai and Tianjin are named after cities. Qingdao, formerly known as Jiaoao, also known as Qingdao and Island City, belongs to Shandong Province. It is the world beer city, the sailing capital of the world, the first batch of coastal open cities in China and the national sanitary city. It is called "Oriental Switzerland", named after the ancient fishing village Qingdao, and now it is also a popular tourist destination. In the late Qing Dynasty, after Qingdao was occupied by Germany, modern urban construction began, so the first batch of road names in Qingdao were German-style, such as William Street (now Taiping Road), Berlin Street (now Qufu Road), The Prince Henry Street (now Guangxi Road) and Hamburg Street (now Henan Road). Many other places are named by nicknames. For example, Zhifu means Yantai, Ziyang means Yanzhou and country-specific ones mean Linyi. In addition, eight passes-Shanhaiguan Road, Jiayuguan Road, Juyongguan Road, Zhengyangguan Road, Ning Wuguan Road, Shaoguan Road, Linhuaiguan Road, Zijingguan Road, Wushengguan Road and Hanguguan Road-were built in the 1920s, named after the famous pass of the motherland 10. As a result, roads named after "Gorge" (Eight Gorges of Tuandao), "Lake" (around Nanjing Road), "River", "Mountain" and "Island" appeared.