llittheguzheng.NowadaysweusuallyuseS163-21model.SonbehalfofSshapedYueMountain,163onbehalfofthelengthoftheguzhengisabout163cm,21onbehalfofthenumberofGuzhengstring.163cm21chordsGaoShanLiuShui(高山流水)-HighMountainsFlowingWater,GuzhengSolo,posedbyBoYa(伯牙)before221BC.ListedasoneoftenbestancientChinesemusicpieces,"HighMountainsFlowingWater"haslyreandzitherversions,bothinspiredbytheclassicalallusion:Boyaencounteringapersonwhounderstandshiszitherperformance.AndwealsoknowanotherancientChinesetune----MelodiesFromTheNightFisherman(渔舟唱晚).Wecanlistenafewpieceofitafterweatherforecasteveryday.TheguzhenghasbeenusedbytheWangYong(王勇)intherockbandofCuiJian,aswellasinfreeimprovisedmusic.NowavarietyofpopularmusicwasadaptedintotheGuzhengmusic.Itisobviousthatguzhengwillcontinuetodevelopasnationalmusicalinstrument.