"All kinds of food" In the Millennium, Liang Zi and Tang Gaozong attacked and destroyed Japanese hegemonic ambitions.

The Korean peninsula entered the Three Kingdoms period around 1 century and was divided into three countries: Koguryo, Silla and Baekje. In the 6th century AD, Goguryeo, which borders China, formed an alliance with Turks, Baekje and close Japanese because of the Sui and Tang Dynasties' invasion of China, while China formed an alliance with Silla threatened by Goguryeo and Baekje.

In March 660 AD, Baekje invaded Silla with the support of Koguryo, and the Silla army was defeated one after another. King Luo Wulie turned to China for help. As a general, Zuo Wuwei's general Su led Tang Jun to crusade against Baekje. In July, the Baekje army was defeated, King Baekje and Guan Bai were captured in Chang 'an, and the Baekje dynasty collapsed.

In 66 1 AD, Chen Dao, a monk of Baekje, contacted the minister of Baekje adherents to plot to restore the country, and sent envoys to Japan twice for help, demanding the release of Baekje Prince Zhang Feng who was still held hostage by Japan. 1962 Spring, Japanese Emperor Atan Birov led 170 warship to escort Prince Baekje back to China. Prince Baekje was appointed Baekje King after his return to China, and organized Baekje adherents to fight against Tang Jun. At the same time, Japan strongly supported the pro-Japanese regime on the Korean Peninsula and provided a lot of assistance to the Baekje regime.

However, the good times did not last long. In 663 AD, Baekje Hospital, which had just been pieced together, had internal disputes because of the unbalanced division of internal rights. At the request of Prince Baekje, Japan sent heavy troops to North Korea, and the naval battle at Baijiangkou took place under such circumstances.

News of Japanese support for Baekje reached China, and Sun, the right-back general, was immediately sent to reinforce Liu who was fighting Baekje. In September, Tang Jun met Liu and decided to capture Zhou Liucheng, the home of Baekje, where a group of murderers gathered, thinking that "if you stay for another week, Zhucheng will perish". So the soldiers of the Tang army were divided into two ways: Sun, Liu Renyuan and Silla general Jin Famin led the troops to Zhouliucheng by land; Liu, Du Shuang, and Fu Yulong, commander of the Baekje Military Region of the Ministry of Foreign Affairs, led warships to escort and attacked from Baijiang River and Land.

On the 27th, the main force of the Japanese water army supporting Baekje met Liu's army in Baijiangkou. The two sides fought and the Japanese retreated. On 28th, Japanese generals met with Baekje King and thought that there were more than 400 warships in Japan, while Tang Jun only had more than 100. This was an overestimation of their own strength and blind belief that they were "waiting to retreat". Therefore, in the absence of rectification and deployment, they "led Japanese soldiers to the army of Datang Jian Zhen in chaos". The two sides launched a fierce naval battle, and Tang Jun "seized the ship".

Baekje was defeated by the failure of Baijiangkou and fled to Koguryo. The others surrendered and Baekje was completely destroyed.

The victory of the naval battle in Baijiangkou completely shattered Japan's ambition to invade the Korean peninsula. Emperor Tianzhi was worried that Tang Jun would attack the mainland. Since 664 AD, he has invested heavily in building four defense lines in China. After that, Japan adjusted its foreign policy, surrendered to the Tang Dynasty and began to learn from China for self-improvement.