The all-rounded grandmaster of the life I yearn for

Qin Yun, the handsome youth from Xiangxi Village, activated the Omnipotent Grandmaster System and became an omnipotent Grandmaster in a second. He was invincible from the start!

Astronomy, geography, zither, chess, calligraphy, painting, martial arts, and medical skills were all at the level of grandmasters. How could others play with them?