The Gegu Baonianhui arose in the late Ming Dynasty and flourished in the Qing Dynasty. The main activity area of the Gegu Baonianhui is in the Gegu Town area of Jinnan District, Tianjin. It was formed under the influence of the Gegu people's long-term hard work in fishing, salt making, farming, and major economic activities such as water transport in the Yuan, Ming and Qing dynasties, and under the nurturing of Gegu's unique underground city culture. The worship of the Queen Mother of Heaven (Mazu) was the most popular belief and custom among the people of Tianjin in the old days. For a long time, people have regarded Lin Mo (the Holy Mother of Heaven), a fisherman's daughter from Fujian, as a god, respectfully calling her "Niangniang", praying for the protection of the Niangniang (Mazu) and blessing the safety of the sea journey. Gegu Town is a place where the sea is retreated, and maritime affairs are complicated. Therefore, there are many believers of the Niangniang (Mazu), and the people have undoubted faith in the Queen Mother of Heaven. In the long-term Mazu worship activities, the people of Gegu have also included dozens of local folk flower fairs represented by the Baonianhui. During the Yongle reign of the Ming Dynasty, folk flower fairs celebrating the harvest gradually emerged in Gegu Town. Therefore, the names of the old fairs that have been preserved today often contain the word "le", such as the Qingpingle Bamboo Horse Old Fair, the Changle Stilt Fair, and the Shengle Bangzi Fair. The Baonian Fair, which combines flower fair performances and blessing, began during the Wanli reign of the Ming Dynasty and flourished during the Qianlong reign of the Qing Dynasty. During the Republic of China period, a pattern of playful fairs and seated fairs was basically formed. Playful fairs consisted of more than a dozen flower fairs, and seated fairs consisted of eight sedan chairs and two pavilions, namely the table pavilion, the lantern pavilion, the Baonian, the North Tea Shed Phoenix Chariot, the East Tea Shed Phoenix Chariot, the West Tea Shed Phoenix Chariot, the Xiangdou Tea Shed Phoenix Chariot, the East Middle Street Tea Shed Phoenix Chariot, the Barracks Tea Shed Phoenix Chariot, and the Pavilion Tea Shed Phoenix Chariot. Later, the Holy Mother Sea Pavilion was added in front of the East Tea Shed Phoenix Chariot, which enshrines the Holy Mother of Heaven. The Gegu Baonian Festival sacrificial ceremony can be divided into three main parts: setting up the display, welcoming the emperor, and sending off the emperor. It includes two parts: the seated music party and the play music party. It is also a large-scale entertainment performance of the folk flower fair (formerly called the incense fair). The Baonian Festival has formed a set of customary festival procedures centered on welcoming and sending off Mazu. There are eight tea sheds in the Baonian Festival, namely the East Tea Shed, Baonian Tea Shed, Barracks Tea Shed, East Middle Street Tea Shed, West Tea Shed, North Tea Shed, Pavilion Tea Shed, and Incense Fighting Tea Shed. Each of the tea sheds is dedicated to a goddess: the East Tea Shed is dedicated to Mazu, the Baoyan Tea Shed is dedicated to Yunxiao Goddess (commonly known as the Grandmother by the people), the Yingfang Tea Shed is dedicated to Qiongxiao Goddess (known as the Second Grandmother by the people of Gegu), the Dongzhong Street Tea Shed is dedicated to Bixiao Goddess (known as the Third Grandmother), the North Tea Shed is dedicated to Bixia Yuanjun also known as Taishan Goddess, the West Tea Shed is dedicated to Vision Goddess, the Pavilion Tea Shed is dedicated to Descendants Goddess, and the Xiangdou Tea Shed is dedicated to Pox Goddess. It is not difficult to see the diversity and inclusiveness of the ancient town culture from the goddesses dedicated. At the beginning of the sixth day of the first lunar month every year, the folk artists of Gegu Town begin to get busy. On the sixteenth day of the first lunar month, the Baoyan Festival officially begins. The sixteenth day of the first lunar month is the day to welcome the emperor. The legendary goddess returns to the palace to visit her relatives, and the chariot festival enters a climax, and each chariot and festival will have a great time. The square of the Niangniang Temple is the center of the bustle. After lunch, the entertainment club will enter the square first. Each chariot will start from the tea shed and gather in order at the designated place in the square. After arriving, each club leader will enter the temple according to their own club leader flag. The host will announce the incense burning and worship. Immediately, firecrackers will be set off and drums and music will be excited. After the worship, the idols will be placed in each chariot. The big chariot is in the middle and the chariots are arranged in a goose-wing pattern. All the members of each club and each chariot will line up to worship one by one. This is called "receiving the emperor". After receiving the emperor, they will start to walk into the club and each will set off in turn. Stilts, lion dances, land boats, dragon lanterns, etc. will go to the streets together. There will be one or two flower fairs in front of each chariot. Each club must use the most sophisticated means to perform in turn. They must perform a chariot running performance. The more complex the pattern and the more stable the steps, the more superb the running skills will be. After midnight, everyone will return to the Niangniang Temple Square to hold a ceremony for the Niangniang to leave the chariot and return to her seat. Just like when receiving the emperor, everyone will worship. Finally, the "box lantern" was set off, and fireworks were set off at the four corners of the square at the same time, and the lively scene lasted until dawn the next day. The Gegu Baonian Festival is a traditional folk and folk cultural activity with many cultural contents such as the local history, folk customs, beliefs, art, and commerce in Jinnan. In 2014, the Mazu Festival (Gegu Baonian Festival) applied by Jinnan District, Tianjin was approved by the State Council of the People's Republic of China to be included in the fourth batch of national intangible cultural heritage list, with project number: -36.