I want to know the answer to the following question:
What was used during surgery to relieve patients of their pain?
All the background I'm provided with is that "When surgery was performed by the physician Hua Tuo (d. 208 AD), he used anesthesia to numb his patients' pain and prescribed a rubbing ointment that allegedly sped the process of healing surgical wounds.". Is that enough to answer the question?
Answer: yes