Swallowing Swords Makes Me Stronger

Xu Wang bought a strange book at a second-hand bookstall, but was picked up by a dump truck on his way home. When he opened his eyes again, he became a thin beggar, with an extra copy of "Sword Swallowing Manual" in his mind. There are martial artists and Qi practitioners in this world, but he only has this outrageous technique. Swallowing pieces of iron will make your skin tougher; swallowing broken swords will increase your strength by three points. In order to survive, he could only bite the bullet and swallow. Until one day, he swallowed a real flying sword... The way to become stronger was really under his throat?