What are the requirements for printing the pictures in the album? Can I change the resolution of the picture?

Can Meitu Xiu Xiu change the resolution and pixels? You can only change a big picture into a small picture, but you can't change a small picture into a big picture. If Meitu Xiu Xiu can have this function, then photographers don't need to buy a high-pixel camera, so they can use a mobile phone. Printing pictures requires cmyk mode with a resolution of over 300dpi. Basically, it takes more than 2m for a picture to be printed. Thumbnails on the internet can't be printed at all, especially your qq screenshots.