C303 The Best Calculation in the World

Just as the question left his mouth, Shen Wanqing stood up and pinched his fingers, "Master Sima! Heroes! I, Shen Wanqing, am a native of Suzhou and am somewhat familiar with the situation here. According to my deductions, this murderer is one of the four most powerful martial artists, 'Lightning Falling'. This person's sabre art was so fast that it was almost invisible. However