1, homophonic memory: Wei, Chu Yan (Yan) Qi (Qi).
2. Orientation memory: according to the geographical location of the six eastern countries, the middle three countries, Korea, Zhao and Wei (between the north and the south), were destroyed first, and the other three countries, Chu Yanqi (between the north and the south), were destroyed later.
The order in which Qin destroyed the seven countries was Korea, Zhao, Wei, Chu, Yan, Qi and Qin.
Extended data:
The process of Qin state destroying six countries
1. Beat Korea. In the seventeenth year of Qin Shihuang (230 BC), the State of Qin began to destroy the Six Kingdoms. Qin Wei completely destroyed North Korea, and Songshi led the army to attack North Korea again, but North Korea was unable to resist. Neishiteng commanded Qin Jun to conquer the capital of North Korea, captured Wang An of North Korea, and changed the acquired land into Yingchuan County, and North Korea became the first country to be destroyed at that time.
2. break Zhao and force Yan. After Qin destroyed Korea, the second goal was Zhao. In 229 BC, Zhao suffered a series of major earthquakes and famines. Qin Shihuang once again ordered Wang Jian and Yang Duan to launch an all-out attack on Zhao. Wang Jian used double agents to buy Guo Kai, the courtier of Zhao Wang, slandered Li Mu and others, saying that they were going to rebel, prompting Zhao Wang to kill Li Mu. In 228 BC, Wang Jian defeated the Zhao army, occupied Handan, captured Zhao's family and occupied Zhao's native land. Then it moved north, stationed in Zhongshan (Dingxian County, Hebei Province) and approached the State of Yan.
3. Break the Yan State. The practice caused panic among Yan and Dai. Prince Dan of Yan took in Fan, a traitor of Qin State, and met the assassin Jing Ke through Tian Guang, a warrior of Yan State, in an attempt to assassinate Qin Shihuang. However, Jing Ke's failure to kill Qin Shihuang aroused Qin Shihuang's anger towards Yan State. In 226 BC, Qin Jun captured Ji Cheng (now Beijing) in Yan Dou, and Wang Xi and Taizi Dan of Yan fled to Liaodong.
4. Occupy Wei land. Wei, Wang Ben led the troops. In the twenty-second year of Qin Shihuang (225 BC), Qin sent troops to attack Daliang (now Kaifeng, Henan), the capital of Wei Dynasty. Wang Ben, commander-in-chief of the Qin battlefield, thought that the wall of Daliang City was strong and it was difficult to attack and pull it out in a short time, so he led the Yellow River water from the gap to irrigate Daliang City. After three months of war, the city walls collapsed, Wei came out and was killed by Wang Ben. Wei perished, and Qin established its own land as the East County.
5. Cutting Chu on a large scale. In 225 BC, Qin Shihuang sent Li Xin to attack Chu. Li Xin underestimates his enemy, winning first and then losing. In 224 BC, Qin Shihuang personally invited veteran Wang Jian to lead 600,000 troops to attack Chu. Destroy the Chu army in the south, kill Xiang Yan, the general of Chu, and occupy a large territory of Chu. In 223 BC, Wang Jian and Wu Meng jointly attacked Shouchun, the capital of Chu, and captured the king of Chu alive. The following year, Wang Jian led an army to cross the river, pacify the Jiangnan area of Chu and surrender to Baiyue King. Chu declared its demise.
6. swallow. In the 26th year of Qin Shihuang (22 1 BC), Wang Ben moved eastward into Liaodong, wiped out the remnants of the Yan State and captured the prince alive. Then he led the army south, suddenly attacked north from Yannan, and took Linzi directly. Qi was unprepared for the war and had no soldiers to fight. After the victory of King Xiang of Qi, he persuaded the King of Qi to surrender (like Zhao, there were a large number of traitors), and Qi surrendered without a fight.