Han XiGuang knew where his brother would be. It's easy to guess and he knew well that the next place his brother going to visit after this hotel is Wu SuYi's location. It seemed that Han YouRan was hella pissed in finding out that his beloved little brother wasn't going to be as psychotic as he had wished. Han Xi Guang could tell that his brother was also trying to make him into a monster, to mold him into a creation that his sadistic brother could be happy with.
What a nonsensical monster.
Han XiGuang knew he was a monster but he didn't know that there could be someone worse than him.
Perhaps their blood was really cursed or perhaps only them, the two male siblings were cursed in this bloodline. This was also the reason why he felt so relieved when seeing Rui turning out to be someone so gentle and loving unlike him or his real father, Han YouRan or his mother who was ready to used her unborn baby as a chip for her own dangerous plan.