@xinlihan, I hope at this time the therapy is having the desired results. My sister-in-law underwent the same therapy many years ago so I know the outcome can vary greatly. In her case her depression was not lifted. I want to share a possible complementary approach with her doctor's approval and your further research. Vitamin D and B1 are two vitamins needing activation by magnesium. All three are often deficient and all three are important for mental health. The brain has a heavy reliance on activated vitamin B1 (thiamine) and ironically the blood/brain barrier inhibits water soluble thiamine. Free thiamine is not lipophilic and cannot cross the blood-brain barrier by simple diffusion. Transport of blood thiamine to the brain parenchyma is carrier-mediated and it is a slow process. Oil soluble forms of thiamine more readily pass through the blood brain barrier. The healthline link is about vitamin D and a 25(OH)D can determine if a deficiency exists. I hope this information serves as a springboard to become more familiar with these elements and others like omega 3 that benefit the brain's many conditions and functions.
https://www.verywellmind.com/magnesium-for-depression-does-it-help-5112650
https://www.krispin.com/magnes.html
https://nootropicsexpert.com/vitamin-b1-thiamine/
https://www.everywomanover29.com/blog/fatigue-sleep-disorders-depression-anxiety-
fibromyalgia-and-cardiac-troubles-as-the-expression-of-a-classic-mild-thiamine-deficiency/
http://stuttersense.blogspot.com/2014/08/these-factors-reduce-your-thiamine.html
https://www.healthline.com/nutrition/depression-and-vitamin-d