Ou Yan picked up a pen and explained in a soft voice, "This part can be modified like this..."A dozen or so sketches, under Ou-yan's guidance, quickly transformed into stunning works of art.Yin Papan...as free time.Back then, when she was learning, she didn't skimp on hard work. She chopped vegetables until her hands were almost severed; just thinking about it makes me exhausted."Normally, I would h...