Dali Ancient City Catholic Church is located in a quiet alley on Renmin Road in the ancient city of Dali, built in 1927. The official introduction of Catholicism into Yunnan is at the end of the Ming Dynasty and the beginning of the Qing Dynasty. There are two main ways: First, the Queen Mother, Queen, and the Royal Attachment of the Royal Family in Nanming. Second, some members of the Sichuan church migrated to the northeast of Yunnan, which is today the northeast of Zhaotong Yanjin County and other places, and then there were priests from Yibin to Yunnan for pastoral visits and missionary work, which led to the further development of Catholicism in Yunnan. The church is located in the quiet alley of Xiaguan, the ancient city of Dali. When we step into the narrow antique and full of Bai architectural style, we will see a simple church that integrates Chinese tradition and Bai architectural art style - Holy Three Church, which stands in the sun. It was particularly obvious, and when we approached, we were completely fascinated by it.