In the long history, although there are thousands of wars in China, not all countries attach importance to killing dragons. This may be because there are many symbols related to dragons in the history of China, such as "Dragon" representing the son of heaven. However, even in modern times, the Dragon Slayer is still kept secret, and even regarded as banned books, such as Shang Jun, Long and Short Sutra and Warring States Policy.
In modern society, dragon slaying is not directly involved in China's education system, but in some traditional cultural courses, it may involve understanding the historical background and cultural connotation of dragon slaying. This may be because modern society emphasizes peace, rationality and harmony, and killing dragons is regarded as a symbol of excessive violence or conflict to some extent.
In a word, the reason why Dragon Slaughter appeared and was taught in China is because of the special background related to dragons in China's history and culture, and the need to overthrow and change power in history.