C1007 Independent Hearing

In a small equipment room, Sun Lu swallowed his saliva as he saw the blood which was so red that it had turned black flowing from the needle into a test tube. He could not help but ask the middle-aged white coat that was taking my blood:

"Chief Liu, what is this test about?" "Why is the test tube not marked?"

Chief Liu looked at him, then looked at Guo Sen, who was at the side