"Cousin Lu!" Mu Liuyun rushed up with an arrow and caught Professor Lu's shaky body: "What's wrong with you?"

Bai Jingyan also saw something wrong. He stood up on crutches and twisted his thick eyebrows into a concerned shape: "What's wrong with you?"

"It's all right," Professor Lu said with a grin and a white face. However, he said, "It's all right. The red blood flowed from his teeth." When he coughed, he took the rest of the medicine for appendix at night.

"What?" Mu Liuyun cried in alarm, "Quick! Call the doctor!

"No! No more!" Professor Lu grabbed Liuyun's arm and said, "I can't save this medicine if I...