Demonstratingtheapproachtoprotractthefigureofthree-dimensionalgraphswithgeometricalformsintwo-dimensionalplanes,graphicsisabasictechnicaldisciplineofexaminingprotractingengineeringdrawingsusingthemethodofprojectionandaddressingissuesonspacegeometryaswellasitstheoryandapproach.Graphicsisalsoakindofsemioticsystemofwriting.ChinaboastsofrichtraditionofgraphicswithamazingarchitecturaldrawingsinPre-Qinperiod,boomingtheoriesofgraphicsinWeiandJinDynasties,refinedprotracteddrawingsinSongandYuanDynasties,andgraphicsbeingregardedasimportantinstrumentsinMingandQingDynastieswhenthoroughapprehensionwerepursuedinordertoseekthepracticeofadministration.ItnotonlyformsthebasisformodernandcontemporarygraphicsinChina,butalsoshapesthefuturedevelopmentofgraphics.
