Using the term "cure" is not commonly used in cancer treatment. Normally terms such as the cancer has responded, gone into remission, successfully treated and other such comments. We like to say we kill cancer cells and cancer stem cells which are the cells that spread cancer.
Something you may be interested to know is that with treating humans in China, Dr. Tsang is only getting patients for Palliative care which is specialized medical care for people living with a serious illness. This type of care is focused on relief from the symptoms and stress of a serious illness. The goal is to improve quality of life for both the patient and the family.
So these are patients typically have tried other cancer treatments as their first line of defense and those treatments have failed and according to main medicine these people go into what is classified as Palliative Care which helps the patients deal with a long term serious illness but only focusing on trying to relieve the symptoms.
So those are the patients Dr. Tsang gets in the China hospitals. But that is fine with him, because he still kills all the cancer cells and stops the cancer from spreading. And the people go home and are still alive.
All that said, in just one hospital 352 people were treated, 12,325 treatments were given and 90% of the patients responded successfully to the treatment.