you can try this website: http://support.huawei.com/onlinetoolsweb/swversionmanage/

@Lemon please help！

This post was last edited by Piotrek at 2017-04-06 21:44. Hi,
I've got exactly the same problem. So far I managed to learn from Huawei guys that this platform is no longer in development. That's why the latest generally available software is V2R5, though I also heard that there might be R8 available.
Since they moved with S57 platform base chipset to their own chipset (on which S5720 is built) the only recommendation I got is to replace all 5710 with 5720. This is hardly comforting but I assume there is no other way (if you need full set of features included in higher VRP versions - they say some are simply not possible to implement on s5710 due to hardware limitation).
I'm trying to talk them into implementing some features of my interest at least but I don't think there is good chance of that.

I managed to convince support after much hand-wringing to supply me with V200R005 - which I duly upgraded my switches to on Friday, thanks for the info Piotrek, it would be nice if they release an R8, but given the rest are on R11 - I doubt they'd do that.