If the full code format is adopted, I can remember the jpg format as the picture format, but there are strict rules on the size of each picture. I mean the size of pixels, and I can't remember the specific requirements for a long time, but I remember that there seems to be a hint in the tool for inserting pictures in the previous electronic system.
if I don't get the correct answer tonight, I'll check my records at work tomorrow and get back to you!