North Korea has set up a book province in Huguang, and its geographical location includes present Hunan Province and parts of Hubei, Guangdong and Guangxi. The political department of Huguang was established in the Ming Dynasty, and a part of the book province of Huguang in the Yuan Dynasty, including today's Hunan, Hubei and other places, was still called Huguang. It was also called Huguang Province in the early Qing Dynasty. During the Yongzheng period of the Qing Dynasty, it was divided into Hunan and Hubei provinces, but the governors of the two lakes were still called the governors of Huguang.

The so-called "Huguang filling Sichuan" refers to the immigration policy that Sichuan's population was greatly reduced due to the war in the early Qing Dynasty. This kind of large-scale immigration began in Shunzhi years and continued until Jiaqing years. Most ancestors of Sichuanese came to Sichuan at this time. At that time, people from more than a dozen provinces immigrated to Sichuan, including Hubei, Hunan, Yunnan, Guizhou, Shandong and Jiangxi provinces. Because most of the immigrants in Sichuan Province are "Huguang", this large-scale immigration is called "Huguang filling Sichuan". There was a saying in the Kangxi period of the Qing Dynasty. For example, in the seventh year of Kangxi, Zhang De, the governor of Sichuan, played on the ground.

"Tea Sichuan province is now a relic, and its ancestral home is mostly Huguang trainer. Visiting the elderly in the countryside, I am afraid that every time I am robbed in Sichuan, I have no soil, but I have to move people from other provinces to fill in the place. " An article by Wei Yuan also wrote: "So there was a rumor that Jiangxi filled Huguang and Huguang filled Sichuan.".

The most popular argument about the reason why Huguang filled Sichuan is that Zhang, known as the Eight Kings in the late Ming Dynasty, killed almost all Sichuanese. Some local chronicles and genealogies are recorded, such as

"Dayi County Records (Guangxu)" records that "the only aborigines in Dayi are Han people ... After giving (Zhang) to thieves, there are few relics left. People from Hunan, Jiangxi, Guangdong, Guangxi, Shaanxi and other places came to the city to reclaim wasteland and gathered together. Macheng (now Macheng, Hubei) has more people, followed by Jiangxi, Shaanxi and Guangdong. It is also obvious that "Huguang fills Sichuan".

Besides, people in Sichuan and Chongqing are still telling the story of "Zhang killed chickens and dogs in Sichuan". At present, historians believe that Zhang did cause serious damage to Sichuan in the late Ming Dynasty, but his time in Sichuan was only a few years, and the war in Sichuan in the late Ming and early Qing Dynasties lasted for more than 30 years. The "Zhang Sichuan Massacre" is a bit untenable.

There have been many large-scale immigrants in Sichuan history. For example, after the Qin Dynasty destroyed Ba, the northern population moved southward in the late Western Jin Dynasty, and the third-line construction after the founding of New China, in which Huguang filling Sichuan had the greatest influence. Genealogy and genealogy are very common in families in the south. According to genealogy and genealogy, most ancestors of Sichuan and Chongqing people migrated from Huguang in Qing Dynasty. Especially in the Ming Dynasty, peppers were introduced to China. Today, people in Hunan and Hubei like to eat Chili, and now people in Chongqing, Sichuan also like to eat Chili. Because Sichuan (including Chongqing) belongs to a basin, it is hot and humid, so people here have a spicy taste, which is slightly different from Hunan.