The sign says "Liu Jia prays for protection"? Who can tell me what this means?

Interpretation of Liu Jiaci: 1. Heavenly stems and earthly branches matching is used to calculate the time, including Jiazi, JOE, Shen Jia, Wu Jia, Chen Jia and Jia Yin, hence the name. "History of Hanshu Food": "At the age of eight, I entered primary school, learned the calligraphy of Liujia and Wufang, and knew the parent-child festival." Wang Xianqian quoted Gu as a supplementary note: "Six-legged, four-legged, six-legged, and so on." Zhou Shouchang was quoted as saying, "Learning mathematics is still a matter of words." Hanshu: "Therefore, there are six in the day, five in the morning, and eleven in the way of heaven and earth." "Southern History, Biography of Hermit, Gu Huan": "When you are six or seven years old, you know how to push six." Song Dynasty's "Xie Biao on behalf of Prince Yan 'an County King": "The book, just two years old. "2. Star names. "The Book of Jin Tian Wenzhi" says: "The six stars beside the column are called Liu Jia, which can be divided into yin and yang to match the seasonal climate. "In the Tang Dynasty, the poem" Tianmen Forgive the Year "said:" Welcome the yellow gas, and the three yuan will drop the purple mud. "Ming Hu Zhenheng's Tang Yingui Qian Yi Jian": "Wang Qijing" says: Huang Yun went out four times, and the Lord forgave him. Yellow gas, Huang Yun also. The canopy is like a cloud, and Liu Jia is the name of the canopy column beside the star, so it is used. "3. One of the five elements, that is, the so-called art of avoiding armor. "Preface to the Biography of Fang Shu in the Later Han Dynasty" Tang Li Xian's note: "Hide the armor, push the yin and hide it." Jin's Biography of the Immortal Zuo Ci: "Those who learn Taoism, especially the six masters, can sit under the kitchen in worship of ghosts and gods." In the Southern Dynasties, Chen replied to the official letter: "The five elements have the words of post horses and the words of officials and ghosts." In Tang Zhongquan's poem "To Lv Dongbin", he wrote: "The three corpse gods will be completely defeated, and they can advance or retreat." 4. The name of the Taoist God, the Yang God driven by the Emperor of Heaven; Taoist priests can use spells to summon them to pray for exorcism. Zhang Tang's "Worship Tang Song" said: "On the mature day, the rain teacher preached, Liu Jia lined up, and the Eighth Police Squadron." Song History and Law: "Liu Jia, the messenger of heaven, the wind and hail, ghosts and gods." Bai Yan's poem "Wandering Immortals" 1: "Carina Lau flies to drive tigers and leopards, and Wuxin Town breaks Kirin." Refer to the Jade Sutra of Thunderbolt and Six Secret Methods of Praying for Blessing in Qing Dynasty. 5. Taoist runes. Volume 14 of "Seven Signs of the Cloud": "If evil spirits are eliminated, six Jia and six B symbols are used, and good news is called, ghosts and gods will disappear." Tang Xuanzong's poem "To the Taoist Deng Ziyang" said: "Taiyi Sanmen Strategy, Liu Jiafu, Yuan Jun." Shen Qingqi Qifeng's Strange Marriage of Harmony: "My sister is so eager to escape because there are six symbols under the mattress." 6. Poetic style name. Liu Jiashi, written by Chen Shenjiong in the Southern Dynasties, adds a cross of A, B, D, E, G, N, N before every 20 sentences ... Song Yu Yan's poem Cang Shi Lang Dialect: "There are six schools, ten genera and other styles, as well as Tibetan heads and resting styles, which are absolutely unique today." Xie Zhen's Four Poems in the Ming Dynasty, Volume II: "Shen Jiong's six-house style, eight-tone style, six-family style and twelve-genus style have changed a lot since the Wei and Jin Dynasties." A pregnant woman is called a pregnant woman. "Surprise at the First Moment" Volume 33: "I haven't been married long, and I am really pregnant and have a son." Hong Shen's "Sweet Rice" Scene 1: "This grandson's daughter-in-law, the bride, is pregnant now, and will soon be a good addition." 8. It refers to the ends and tails of tortoise limbs. Zhang Song's Seven Sages "Old Stories of Luo Yang Taigong" Volume 5: "The turtle is only an inch long, white and thin, with a slightly longer neck, like an ordinary turtle, with clear eyes and bright eyes, and does not hide the six armor, and is not afraid of praying for protection.