Li Mufeng was born to be an unlucky person. He had been in constant troubles since childhood. He thought that he must have offended the God of Luck in his previous life. After the car accident, he was unlucky to be blind and see ghosts. The world was suddenly turned upside down, which is as tragic as it can be.
Of course, it also explains the reason why his fate is so miserable. It was all caused by him in his previous life.