Lu Yun recognized that all the doctors on the bulletin board were Red Bracelets, which made the players present turn pale, "All the doctors are Red Bracelets, so if we want to complete the second task, we'll have to kill a Red Bracelet."
To ensure the safety of the Red and Black Bracelets, the White Bracelets who came aboard were carefully selected regardless of background. They were generally players of lower levels. Even if some of the Red Bracelets lacked substantial combat experience, the number and level of items they possessed far surpassed those of the White Bracelets. There was simply no comparison, otherwise, so many wouldn't have been killed at the start of the hunt.
Now the instance had designated Red Bracelets as doctors, obviously setting them up to fight to the death against the Red Bracelets.