Frequent colds in the elderly are believed by traditional Chinese medicine to be a deficiency of Qi and blood in the body and a decline in organ function, leading to a decline in the elderly's ability to resist disease. Qi and blood are the material basis for human body operation and activities, the basic factor for the balance of yin and yang, and maintain the basic functions of the body. If Qi and blood are deficient, Qi and blood will not be nourished, Qi will not be transformed into essence, and blood will not nourish the mind, resulting in a lack of essence, energy, and spirit in the whole person. Therefore, the elderly will have low immunity, are prone to colds, have tired limbs, lack of energy, and are lazy to talk. The elderly have symptoms such as sallow complexion, weight loss, dizziness, insomnia and dreaminess, pale complexion, shortness of breath, spontaneous perspiration, fatigue and weakness, etc. Therefore, the elderly should replenish Qi and blood. The compound donkey-hide gelatin slurry uses donkey-hide gelatin and rehmannia glutinosa to nourish yin and blood. It can effectively nourish the liver, kidney, and lung meridians. It can both replenish blood and nourish blood. Use red ginseng and Codonopsis pilosula to replenish the middle and replenish qi. Red ginseng can greatly replenish vitality, and Codonopsis pilosula can replenish the middle qi. The combination of the two can strengthen the spleen, lungs and heart, which is a great tonic but not drying. Use the flavor of hawthorn as an accompaniment to remove stagnation, remove blood stasis, eliminate greasiness, and dredge qi and blood. Compound donkey-hide gelatin promotes the growth of qi and blood, improves the function and metabolism of internal organs, thereby fundamentally improving immunity and effectively preventing the occurrence of diseases. Therefore, it is said that the elderly can benefit from taking compound donkey-hide gelatin without any harm, so it is the best choice for giving gifts during the Double Ninth Festival.