He later learned that the small yellow flowers of the cassia plants were described by the Tang dynasty poet Du Fu as "leaves covering the branches like emerald-feathered canopies, blossoms innumerable as golden coins." And that the Northern Song dynasty poet Huang Tingjian, who lived nearly a thousand years ago, personally planted cassia, made it into a medicinal pillow, and wrote: "A pillow sack to rest where once my arm would lie. In tranquil sleep I breathe its fragrance deep. These aging eyes still hold their will on high. That reading on may be my lifelong keep." Lin Jueming said that Chinese people had been using cassia seed for a very long time, and Huang Tingjian's practice and poems made him realize that there was culture behind the medicinal herb. That was something he had not expected at first.

　　What amazed Lin Jueming even more was how traditional Chinese medicine integrates health into daily life. He put cassia seeds into a sachet and hung it by his bedside, and brewed a tea of cassia seeds, goji berries, and chrysanthemum flowers for his Chinese classmates. "Drinking a cup of tea, wearing a sachet — this isn't 'taking medicine.' It's a form of self-care as natural as breathing. TCM doesn't just see a disease; it sees a person's entire way of living."