Why do knights call their left hands?

Knight called him left-handed because he used a mouse in his left hand and a keyboard in his right hand, which means he is left-handed. Since his debut, he has been famous for his exquisite operation and gorgeous technology in LPL. At first, he was only called left-handed, because of one of his keyboard habits. Because normal people use the keyboard in their left hand and the mouse in their right hand to operate heroes. Knights are just the opposite. He likes to use the mouse with his left hand and the keyboard with his right hand. At this point, the player affectionately called the left hand. The reason why he became Kim's left-handed player was due to his outstanding performance on the field and being awarded the title of Ran Ran Star in domestic singles.