The security line on the 1999 version of the 100 and 50 yuan bills is magnetic and printed with the light-visible micro text "RMB100" and "RMB50", which is magnetic by the instrument. 2005 version are holographic magnetic windowed security line, the front is fully implanted and the back is half-implanted and half-exposed. The security wire is fully implanted on the front and half-implanted and half-exposed on the back. The exposed part is 5mm long, with a spacing of 8mm in the middle, located at the right of the center of the back of the banknote, and the holographic pattern of "￥100" and "￥50" in the same miniature characters as the denomination can be seen in the windowed part of the banknote.The width of the security line of the 2005 version of the 100-yuan banknote is 0.7mm wider than that of the 1999 version. The width of the security line of the 2005 version is 0.7mm wider than the 1999 version for 2mm. The security line on the fifth set of 2005 and 1999 version of the hundred-dollar bills have a magnetic coating, detection equipment can be measured.