I like the history of the Spring and Autumn Period and the Warring States, the Jin Dynasty, the Southern and Northern Dynasties and the Republic of China. What part of China's history is most worth studying? Why? Whether it is worth studying depends on the purpose.

For local culture, spring and autumn is the best; In revealing personal knowledge, the Three Kingdoms and the Republic of China are the best; From the cognitive reality, The History of Hehe Country in the late Qing Dynasty and the early Republic of China is the best. In shaping national self-confidence, Korea is the best; Meta is the best for cognitive nations; For looking around the world, Xia and Shang dynasties are the best; And anyway, what you are interested in is always the best.