Teacher Ma mentioned in "Wisdom Without Illness" that longan, medlar and red dates were once used for soaking in water.
I do. Because I often face the computer, I often drink longan, wolfberry, red dates and ginger. I think it's quite effective. Later, I found Guo's tea online. His family was making this kind of longan, wolfberry and jujube tea, so I bought it and drank it. It was more convenient and could be absorbed.