Huang Liqing's fingertips hovered over the digital tablet for 0.3 Seconds. On the screen was a fragment of a lacquer screen unearthed from Sima Jinlong's tomb in the Northern Wei Dynasty - two millimeters of stubble on the edge of the ocher cloud pattern. When the scanning accuracy was enlarged to 400%, dark spots caused by thousands of years of moisture could be seen like light ink haloed on rice paper. She pressed the pressure-sensitive pen, and the pressure value of the pen tip was stable at 85, which could exactly reproduce the frustration of ancient craftsmen when using the pen on the digital layer.