First of all, Yuanmingyuan was burned by the British and French allied forces 1956, and Eight-Nation Alliance only robbed the remaining buildings in the park after invading China in 1900.

Reasons for the fire of British and French allied forces;

Because the negotiators of the Qing court had arrested the British ambassador Parkes and his party and imprisoned him in Yuanmingyuan, the British army found the dismembered body of the Times reporter in the garden, and the British commander James Bruce ordered the garden to be set on fire on the grounds of "mistreating diplomats" as a punishment for the Qing court.

In addition, the reason for Eight-Nation Alliance's invasion of China.

1 Boxers kill foreigners and Christians everywhere. Ministers of various countries asked the Qing court to ban the Boxer Rebellion, but there was no response.

Many countries sympathized with the reformists and helped Kang, Liang and others escape from the Qing Dynasty. Afterwards, the queen mother wanted to abolish the emperor and change her position, but she was strongly opposed by all countries and dared not take action. In addition, after the defeat of the Sino-Japanese War in 1894, the great powers rushed to rent harbors and divide their spheres of influence in the Qing Dynasty, which also increased the xenophobia of Empress Dowager Cixi.

Because the Boxer Rebellion attacked the foreign embassies' concessions, German ambassador Cleander went to the Prime Minister's yamen to ask for protection on behalf of all countries, and was ambushed and killed by the Qing army tiger on the way, which led to the fuse of war. After that, the Qing court declared war on eleven countries at the same time.