Su Bai purposely made a call for people to send over two candles and some hell notes[1]. He still had some yellow rice wine at home. There was no need to purchase that.
Lucky returned to the bedroom to look at the painting after annihilating the red dressed boy. It obviously did not feel like it was in any wrong; it was not in the wrong indeed. There was only the little fella in Lucky's eyes. It wouldn't even bat an eyelid towards Su Bai, not to mention that little ghost. An unknown ghost suddenly appearing near the house, Lucky immediately took action for the sake of protecting the little fella; it was considered fulfilling its responsibilities. In truth, if it was Su Bai who realized the red dressed boy was following him home, it could be said that Su Bai would not hesitate to immediately pull out his gun and shoot him to smithereens.
[1]Ritual money made from paper to be burnt for the dead
[2]Sun Wukong, also known as the Monkey King, is a fictional figure who features in body of legends, which can be traced back to the period of the Song dynasty. He appears as a main character in the 16th century Chinese classical novel Journey to the West