Giving food to the fire mouth in yoga is the revised principle of the tantric translation of the Great Rani Sutra for Saving the Hungry Ghost in the Fire Mouth. This book was originally translated by Siksananda in the Tang Dynasty into "God's Curse to Save Hungry Ghosts in Dalagni". "Mianran" means "Flame Mouth" and is the name of a hungry ghost. According to the Buddhist scriptures, Ananda received a face-to-face warning during meditation and asked the Buddha for instructions. Therefore, the Buddha said that this method of giving is to recite the mantra of giving to relieve the suffering of hungry ghosts. After translation, it was lost in the late Tang Dynasty. In Song Dynasty, famous monks learned the truth from immortal scriptures and compiled food utensils to practice this method. In the Yuan Dynasty, Tibetan secrets spread to the Han Dynasty, and the food in the mouth of the flame followed. "Yoga Collection: Flaming Mouth-eater" is now in Tibetan sutra 1 volume, which needs no translation. According to scholars' research, it was translated in the Yuan Dynasty. Its contents began with strictly decorating the Dojo, preparing fragrant flowers, eating and drinking, purifying water, and converting to the guru's three treasures, and ended with Vajrayana's hundred-word mantra, mainly chanting the mantras of offering sacrifices, giving alms, removing sins, giving bodhicitta, entering the world, and summing up the impressions. After the ceremony, there are ten kinds of lonely soul essays and three kinds of conversion praise, which are the basis for future rituals and music. There were many offering ceremonies in Yuan, Ming and Qing Dynasties, but they were different. Among them, in the Ming dynasty, according to the yoga mouth, the secrets were deleted into the altar of yoga, which was called the secret mouth. Later, Hu Hong made a little contribution to this and named it "Yoga Collection to Eat Rites". At the beginning of the Qing Dynasty, Bao Hua Shan Bao Ji was slightly edited according to the Yao Hong edition, and it was named "Collection of Ways to Eat Yoga Flames", which was internationally known as "Huashan Flames". Since then, two books have swept the world. In addition, there are various Buddhist ceremonies, such as fasting Buddha (offering), fasting day, general Buddha, offering sacrifices to Mengshan, meditation at three o'clock, chanting scriptures and chanting Buddha, etc.