The Tianzheng drawings are encrypted.
Format conversion:
① After opening the Tianzheng encrypted drawings with cad, the output is generated: metafile (*.wmf)
② Create a new cad Picture, insert the wmf file you just produced into a new picture and explode it!
In this way, it can barely be edited, but the graphics elements are all broken, especially the text, with a bunch of messy lines, and the effect is very poor
You can try it.