What is the movie "Swashbuckler" about?

The movie "Dang Kou Feng Yun" tells the story of Qi Jiguang Qi Jiguang, a famous general who fought against Japanese invaders. In the middle of the Ming Dynasty, during the Jiajing period, the local government was corrupt and the Ming soldiers were not organized, so the Japanese took advantage of the situation and repeatedly invaded the southeast coast. At a time of internal and external danger, Qi Jiguang was ordered to set up the first "special force" in history with Yu Dayou, the famous "Qi Family Army", and the two of them went south to fight against the Japanese pirates and return peace to the coast, while his wife, who has always been behind him, is also skilled in martial arts and guards the rear for her husband. The wife, who has been supporting Qi Jiguang behind him, is also skillful in defending the rear for her husband. Qi Jiguang led the Qi family army, together with General Yu Dayou, overcame many obstacles and drove away the Japanese forces in the coastal area, defending the country and the people's property safety. The film, directed by director Chen Jia Shang and starring Zhao Wenzhuo, Hong Jinbao, Wan Xi, Hong Tianming, Koide Keisuke, Kurata Bozhao, Wang Zhan, Wu Yue, and Tang Wenlong, was released on May 27, 2017 in mainland China.

Plot-wise, it belongs to a film full of patriotic feelings and national sentiment, the most amazing and Japanese actor Koide Keisuke, he seems to have recently withdrawn from the circle because of sexual assault, right? I am reminded of the time when I was studying Japan in college (I majored in Japanese), the foreign teacher spoke emotionally about the Battle of Baijiangkou, indicating that it was a very important historical event for Japan, and asked the class how the Chinese history textbook described the battle, only to find out that the Chinese history textbook didn't talk about it at all, and that it was just a small conflict not worth mentioning in the long history of China! ......