How to reduce the photo to 100k?

Can use Photoshop software processing, operation method is as follows:

1. First, you need to open Photoshop software on your computer, and then open the picture to be processed in Photoshop software.

2. Next, press the shortcut key "Ctrl+j" to copy the background layer, so as to avoid subsequent operations from damaging the original layer. All subsequent operations will be carried out on the copied layer. ?

3. Next, select "Picture"-"Picture Size" in the toolbar above, and you can see that the size of the picture is 489.3K.

4. Next, reduce the width and height of the picture respectively until the size of the picture is less than 100K, and click OK.