-Traditional style: cities with intact buildings accumulated in one or several historical periods, such as Pingyao and Hancheng;
-Attractions: cities with distinctive personality characteristics due to the superposition of architecture and landscape environment, such as Guilin and Suzhou;
-Local and ethnic characteristics: cities with regional or individual characteristics, ethnic customs and local culture, such as Lijiang and Lhasa;
-Modern historical sites: Shanghai, Zunyi and other cities with distinctive characteristics that reflect an event or a certain stage in history;
-Special functional type: a certain function of a city occupies a very prominent position in history, such as the "Yancheng" of Zigong and the "porcelain capital" of Jingdezhen;
-General historical sites: cities with cultural relics scattered around the city as the main way to reflect historical traditions, such as Changsha and Jinan.