You have to study everything before you can understand its meaning. Xie Chun, the traveler, picked up a book called "The Secret History of Douluo". When he opened it, he found that the history of the mainland has no age. Xie Chun couldn't sleep anyway, and after reading it carefully half the night, he saw the words between the words. The whole book was filled with two characters - feudalism. Xie Chun shuddered, and he decided that he must Stay away from disputes and live a stable life on this continent. PS: In the plot of Dou 1, there will be a certain degree of magical changes, such as the age of the characters.