1. First of all, if the drawing is wrong or damaged, it can be retransmitted.

2. Secondly, the CAD drawing is too large or too complex: Use the Haochen CAD software on your computer to open the drawing, execute the PU clean command, select Clean All, then check and save the drawing, and try opening it again.

3. Finally, the running memory of the mobile phone is too small: close other running software on the mobile phone, and use Haochen CAD Viewer to open the drawing again.