The Great Wall in Wan Li, China, is the longest and largest national military defense project in the world. It embodies the sweat and wisdom of our ancestors and is the symbol and pride of the Chinese nation.
According to historical records, since the Warring States period, more than 20 vassal states and feudal dynasties have built the Great Wall. The first is Chu, which began to build the Great Wall to defend the northern nomadic people or enemy countries. Later, countries such as Qi, Yan, Wei, Zhao and Qin began to build their own Great Wall for the same purpose. After Qin unified the six countries, Qin Shihuang sent a famous soldier Meng Tian to explore the Xiongnu in the north, connecting the Great Walls of various countries, stretching for thousands of miles from Yao in the west to Liaodong in the east, hence the name Wan Li Great Wall and the name "Wan Li Great Wall". But what we see today is mainly the Ming Great Wall.
There are only relics left in Qin Changcheng. Qin Shihuang built the Great Wall with 300,000 people, which created a miracle in the history of human architecture. The construction of the Great Wall objectively played a positive role in preventing the Huns from invading the south and protecting the economic and cultural development of the Central Plains. Dr. Sun Yat-sen once commented: "Although the first emperor had no choice, the Great Wall made great contributions to later generations. In fact, Dayu managed water and so on."