Kill Ghosts with Sword

The protagonist Lin Feng's parents died, his grandmother died of illness, and he lost his iron job, leaving him penniless. Later, Lin Feng accidentally came to a mental hospital. Every night at eight o'clock, there would be evil man-eating ghosts. There are many breathing techniques here, and you can use breathing techniques to defeat the ghosts. There are ten very powerful ghost kings in the courtyard. As long as you defeat them all, you can escape and resurrect Lin Feng's relatives.