The 10th day in Yangzhou refers to the massacre carried out by the Qing army in Yangzhou in April of the lunar calendar 1645. After Shi Kefa, the minister of the Ministry of War of the Southern Ming Dynasty, led Yangzhou people to stop the Qing army from entering the city, the Qing army launched a massacre in Yangzhou. Wang Xiuchu, a survivor at that time, recorded in "Ten Days in Yangzhou" that the massacre lasted for ten days and only 800,000 bodies were collected, hence the name "Ten Days in Yangzhou".

The Three Slaughters in Jiading refers to a historical event of 1645 (the first year of Hong Guang in Nanming and the second year of Shunzhi in Qing Dynasty).

The Qing army issued a haircut order, but Jiading people refused to accept it. Squire Hou Tong once led Jiading gentry and people to revolt against the Qing Dynasty, and Li Chengdong, the company commander of Wusong in Qing Dynasty, immediately led 5,000 troops to attack.

Jiading City was breached, and Li Chengdong, the general of the Qing army, ordered the massacre, which lasted for one day and about 30,000 people were killed. Li Chengdong led the army to leave Jiading City.

Three or four days after Li Chengdong broke the city, Jiading survivors who escaped by luck began to sneak back into the city. After they returned to the city, they regrouped under the leadership of a man named Zhu Ying, with a total of more than 2,000 people. Zhu Ying led survivors in a battle in this ruined city and executed those who surrendered to the Qing army and officials appointed by the Qing army.

More than 20 days later, a general named Wu in Nanming led the rest of the troops to storm Jiading City, and the surrounding people responded in succession, killing the Qing soldiers in the city in flight. Soon, Li Chengdong retaliated with the whole army, killing hundreds of Wu soldiers and nearly 20,000 people who had just arrived in Jiading to avoid chaos. Blood flowed like a canal, which is the famous "Jiading Three Slaughters".