The person being beaten does not feel pain

(This is a long time post, there are some inaccurate details.
58 years old, with salt-and-pepper hair past his ears, thick glasses on a rosy, kind face, Mr. Nguyen Ngoc Noi looks like a construction engineer like his previous role, not like a martial arts master.

To be able to endure as above, it is not because he has the power from immortals or Buddhas, but in fact, Grandpa has mastered the ultimate inner strength of the Wing Chun sect, a sect originating from China, through diligent practice.