Everyone knows that pictures posted on Taobao items are easily plagiarized. Now most sites use watermarks to prevent theft. Although this method can play a certain role, these watermarks also destroy the effect of the picture. So I tried an invisible watermark with PHOTOSHOP, which can be placed in any part of the picture, and it won't damage the picture either, and of course, it's also hard to be erased.
You all can take a look at the picture below, and you may feel there's nothing unusual. Then now, after pressing Ctrl+A, do you see anything? If you're interested, then keep reading.