The teddy bear on the left is basically your raw code - naked, unpolished, and looking like it just crawled out of a 48-hour debugging session. The right side shows what users actually see - the same bear but now wearing a cute sweater that hides all the chaos underneath.
This is the software equivalent of "don't look at how the sausage is made." Your users get the polished, well-dressed product while you're intimately familiar with the bare, slightly terrifying skeleton holding it all together. The Chinese text literally translates to "my source code" and "what users see" - which is painfully accurate for anyone who's ever shipped anything with a comment that reads "// TODO: fix this horrible hack before release".