Never let him out

Father Ren had tried everything to get rid of those bloodstains but the more he wiped them clean the more rotten and dirty blood appeared the next day. It scared him and his wife as they couldn't understand what was going on, he relayed everything to Song Yan and could not help but question, "Why did this keep happening to us, Master?" 

"It's because the ghost is feeling antsy, it's leaving traces of its grudges behind as it cannot get what it wants," Song Yan explained to Father Ren who stiffened but at the same time, he couldn't understand what Song Yan was saying to him. 

Seeing this, Song Yan said to him, "There is something in this house that is protecting your son. He should have died days ago with the destiny that was set for him but he is still alive which shows that there is something that is saving your lives."