According to Guo Family Tree (published in the seventh year of the Republic of China), the fifth generation Sun Guo Zaihui (a native of Huazhou who once lived in Chang 'an) was forced to move to Luoyang at the end of the Tang Dynasty. In the Tang Dynasty and the Ming Dynasty, he was a crack in the young Qing Dynasty. He offended Tang and demoted Wei. Later, his family moved from Luoyang, the capital of the later Tang Dynasty, to Dumagang, No.62, Luling County, Jizhou, until the 26th generation of grandchildren. At the end of Yuan Dynasty and the beginning of Ming Dynasty, there were frequent wars in Sichuan Basin, bandits were rampant, people were in dire straits and the land was barren. The old people starved to death in the ditch, and a few fled to other places. Seeing that the population of Sichuan is getting smaller and smaller, hongzhi emperor sent a letter to emigrate. Sun Moruo, the 36th generation of Guo Ziyi, was recommended by Garbo to abandon Huchuan and Deciduous Bay in the second year of Hongzhi in Ming Dynasty (1490). It can be seen that the descendants of Guo Ziyi moved to Daying County in the Ming Dynasty for more than 500 years, and now there are descendants in both Britain and Pengxi.
Tanmuwan is the ancestral home of Guo Ziyi's descendants in Shu. After the death of Guo people, many tombstones were buried here, thus many beautifully carved and colorful tombstones were formed in Tanmuwan, Chongyin Temple, Shimen Office, Longsheng Town, Daying County. There are four existing tombstones, engraved with many beautiful words in regular script, and engraved with pictures such as "Lucky Dragon and Phoenix" and "Playing Pearl with Two Dragons". It is engraved with the names of Guo, Guo Minmei, Guo, Guo Shimao and others. Guo Tombstone, one of the ancient tombs, records Guo's ancestral home in Macheng, Hubei. This tombstone stood for 20 years in Jia Zhu nearly 200 years ago. This tombstone is different from other tombstones. There is a totally enclosed flower-shaped stone barrier in front of the bitter monument, which covers the inscription in the barrier. The barrier is exquisitely carved, with a five-petal flower in the middle. You can clearly see the words on the tombstone through the flower hole. Due to the protection of the interlayer, the blue paint engraved on the tombstone has not peeled off after nearly 200 years of sun and rain.