C6401 Something Unexpected Had Happened

A chill crept up between Sun Xin's nostrils.

At this moment, Sun Xin's face suddenly turned red, and his young body became straighter.

"This is..." The old man asked in surprise.

Lu Yu smiled faintly and said, "I have repaired his heart meridian. Old man, you don't have to worry about your grandson's heart meridian anymore."

The old man quickly called Sun Xin to his side and checked his pulse