Secondary outcomes are Self-Rating Depression Scale, Depression Scale of traditional Chinese medicine (Depression Scale of Traditional Chinese Medicine), brain fMRI and blood biomarkers including neurotransmitters serotonin, dopamine, noradrenaline, inflammatory cytokines inerleukin (IL)-1β, tumor necrosis factor-α, IL-6, and neurotrophin BDNF. The gene discussed is BDNF; the disease is major depressive disorder.