He is very famous and my son has visited him before. It is quite difficult to make a reservation. I have tried before and the reply is I have to wait for a week. In fact, personally his practice is not my cup of tea because he tends to employ strong medicine.
My son has coughed for a long time. Eventually, I tried to make "crocodile soup" for him. In addition to the swimming class twice per week (suggested by Dr. Maurice Leung), he is very good now.