Guardian Sword Spirit

Yang Xiao is an orphan. He was adopted by Mr. Qin, a man with great medical skills. One day he went up the mountain to collect medicine and accidentally fell into a cave. However, he saw nothing in the cave. Just when he was trying to figure out how to get out, the hole where he fell fell out. A broken sword fell from the mouth, with only the hilt and half a foot of the blade. The sword was exquisitely forged, and there were two things similar to rubies and sapphires on the hilt. When he looked carefully, Yang Xiao fainted due to lack of oxygen in the cave because of the thin oxygen in the cave.