C205 The Perfect Explanation of a Genius(part I)

Tang Bohu couldn't help but feel a chill in his heart. He glanced at the 'evil' Old Master Yun and asked with cold sweat on his forehead, "Then, old man, how long will this special training take?"

Old Master Yun smiled and stroked his beard. He said, "I will give you one month. But... As for how much you can learn, that will depend on your performance. Of course