Where did the blood come from?

The eunuch sprawled on the ground started to shake. He had already cleaned the traces of blood by his lips when he entered. He thought about how he was going to get through this. If the Empress found out that it was his blood that had been sprayed on her favorite niece's painting, he would definitely die. However, he dared not lie to the Empress. The Empress looked like she was going to get into an argument with King Xuan. There was not just one ...