The middle-aged man took a deep breath, and then did something that surprised Yun Hao very much.,The middle-aged man beamed with excitement, "Oh, right, I forgot to introduce myself! My name is Ding Mao, from the Liu Dao Pai of the Human Domain. If you don't mind, you can call me Big Brother Ding!",Once someone infected with centrifugal plague is found, isolation measures must be taken to prevent the spread of this plague.。