how may I get a Visa for medical treatment

Dear, as for medical treatment, you need to apply for S type. You should first prepare those documents including your passport and copy of its data page, the application form attached with a passport-style photo and diagnosis certificate or an invitation from a PRC hospital, flight tickets booking record, and bank savings account as well as other relevant documents required by the consular officers. Afterwards, submit your application to the embassy of PRC to apply for it.