Which doctor? How do you know the doctor you go to will be a specialist for the treatment that you need? You should look up online to see what treatment options are available and which doctors/hospitals/clinics specializes in what forms of cancer.
The case in here is that the student had stage iv synovial sarcoma. And chemo and radiation didn't work. That's pretty poor prognosis, so they went down the experimental route. But the hospital that they went to basically falsely promised that they had a 80-90% chance of curing the cancer using a immunotherapy technique not cleared in any country for treating the cancer that he had. I remember reading in one of the articles in Chinese that the technique was already proven to be ineffective against sarcomas. So the issue is that basically the hospital lied.
And finally, the kicker of all of this pile of crap, is that the hospital that performed the procedure wasn't even the hospital that was advertising on Baidu. The hospital that was advertising used to be a pretty famous hospital and it was a military hospital which used to be inaccessible to non-military personnel or their families (Second Hospital of Beijing Armed Police Corps). However, this has changed in the last several years, but to cope with the huge influx of the number of patients wanting to get the best, the hospital outsourced the cancer treatment to a different hospital. And the outsourced hospital could use the name "Second Hospital of Beijing Armed Police Corps) despite not actually being part of the hospital. The the worst part of all of this is that the outsourced hospital also named one other famous organization in the cancer (specifically the immunology) field. They claimed that this treatment was a joint research with Stanford, which of course is a lie as well.