The Japanese invaders occupied Peking, and the secret recipe of Baicao Hall, the "old Bai Family", became the object of the Japanese army's covetousness. Bai Jingqi (played by Chen Baoguo), the seventh master of the Bai family, who was determined to deal with the Japanese invaders to the end, secretly transferred the secret recipe with Li Xiangxiu (played by Jiang Shan) that night, but was unanimously opposed by Yang Jiuhong (played by He Saifei) and others. Bai Zhanyuan (played by Tong Ruixin), the grandson of the seventh master who insisted on resisting Japan, fled to the liberated area to join the Eighth Route Army. As the president of the Chamber of Commerce, the seventh master smuggled a large number of banned drugs to the anti-Japanese front and the liberated areas. The seventh master was imprisoned, and Li Xiangxiu mediated in many ways and finally sentenced the seventh master not guilty. Finally, Japan surrendered and the whole family rejoiced. The liberation army entered Peking, and the Bai family received profound ideological education. In the "public-private partnership" movement, the seventh master donated the "Bai Family Secret Recipe" that had been treasured for a hundred years to the country. However, the Bai family turned against each other because of the division of the family property. The Seventh Master witnessed all the misfortunes in his family and made a will to donate his property to the Forbidden City. Written and directed by the famous Chinese film director Guo Baochang, "The Mansion Gate 2" not only continues to use the original cast with a strong cast, but also adds a group of powerful new forces such as Jiang Shan, Liu Bei, Yu Feihong, Wang Qian, Liu Bin, and Tong Ruixin. In this series, the story continues to revolve around the medical family Bai family. This big family, which has risen and fallen with the nation-state, faithfully reflects and witnesses the historical process of the late Qing Dynasty, the Republic of China, the warlords' melee, and the liberation period.