but how to distinguish between original and "Chinese" SwissCard.
Sometimes you just can't be certain, but my rough guide would be:
Since genuine SwissCards sell for over $20 a SwissCard selling for under $10 is >90% likely to be fake. A SwissCard selling for under $5 is >99% likely to be fake. From personal experience: A SwissCard selling for US$3.33 is not only likely to be a fake but at that price it is likely to be a poorly made fake that may look OK but really doesn't work well and the more you play with it the crappier that you realise it is.
Any photo of the Scissors (for example) would show what looks pretty much the same as the genuine ones - they really do look exactly like the Victorinox SwissCard scissors, but they don't cut like the genuine scissors. Pictures aren't necessarily enough to be sure you are getting a genuine product.
On these fakes probably the easiest difference to see is the colour of the toothpick - obviously it was cheaper to mould it with the same plastic as some of the other parts, but Victorinox uses a different colour plastic on their toothpicks.