Chen Jinggu, Li Sanniang and Lin Jiuniang are collectively known as the "Mrs. Third Nai". Chen Jinggu is called the eldest grandma or grandma. Other aliases include Mrs. Chen Nai, Mrs. Linshui, Mrs. Tzu Chi, Our Lady of Shuntian, etc. . The second grandmother, Lin Sha Niang, is also known as Lin Jiuniang or Mrs. Lin. Third Nanny Li Sanniang is also called Third Nanny Li or Mrs. Li. However, in some places, "Mrs. Mistress" is used to refer specifically to Chen Jinggu.
Chen Jinggu was born in the second year of Dali of the Tang Dynasty. She was proficient in magic. When she was pregnant, she happened to encounter a severe drought in Fujian. She had a fetal movement when she was pregnant and praying for rain. Unfortunately, she died of miscarriage. Before she died, she made a wish: "It will come true after I die." God specializes in rescuing women who are having difficulty giving birth." During the Jianning period, a woman who was 17 months pregnant and unable to give birth was treated by Chen Jinggu. As a result, she gave birth to several venomous snakes and the mother was safe. It is also said that there was a giant python in Linshui Township, Gutian County, which spit poison and hurt people. One day, the villagers saw a woman in red clothes killing the poisonous snake with a sword. The villagers asked her who she was. She disappeared after replying: "I am Chen Jinggu." Therefore, the locals built a temple for her on the cave and respected her as "Lady Linshui". Legend has it that Chen Jinggu, Lin Sha Niang, and Li Sanniang were sworn brothers to Jinlan, and together they studied Dharma with Master Xu Xun on Lu Mountain. After completing their studies, they went down the mountain to preach. Therefore, the Taoist sect with Mrs. San Niang as its main deity and founder is called "" "Mistress Pie".