Seeking Dao Xingyan

The protagonist was stabbed in the back by a grown-up boy, seriously injured, and almost died on the street. From then on, his heart was sealed, and he only had one word, kill! Later, he met a person who attracted his attention, but that person turned out to be the prince. They were separated because of their different ways. One was for the emperor's art, and the other was for his own way.