I had bought several pairs of the shorts marketed as "Leward" brand.  All of them in the Asian Large size to fit my small-to-medium waist.

The photo of these "Perman" shorts looks exactly like the ones sold as "Leward" and since they are cheaper (I paid about $5.57 plus $2 shipping from China so they aren't much cheaper) I decided to try the X-Large Asian size just to see if I would be happier with a slightly looser fit than the snug large I'd bought from Leward.  Lo and behold they are NOT exactly the same:

1. The "Perman" waistband is NOT elastic so the drawstrings are mandatory to hold them up.  All of the "Leward" shorts have elastic in the waist and there the drawstrings are not needed in the size I bought.  This is not a terrible thing - they ARE comfortable in the waist.  Just be aware!

2.  The "Perman" drawstrings are not capped off, so they are just cords fraying at the tips.  And since the waistband is not elastic, these are essential.  If they ever come out during the wash you're going to need to thread them back through or toss the shorts.

3.  The "Perman" pockets are absurdly shallow.  I get my hand in there and it's only to my knuckles.  The "Leward" shorts pockets come up to my wrist.

4.  The "Perman" fabric (at least in the white ones) is noticeably thinner than the Leward pair.  That is not necessarily a bad thing either - these are more of a summer weight whereas the Leward would likely be too warm in nice weather.  Just remember that if you are going commando and backlit, it's not going to be much of a secret what you're hiding in there!

All in all, I like these OK despite the annoying pockets.  Hands down, the Leward shorts offer more quality bang for the buck overall.  The saving grace for the "Perman" shorts is the thinner fabric for warmer weather wear.  Just be aware of the tradeoffs.