I don't know about that box, since I know nothing of QFIL, and I'm not entirely sure that one would work either. It can't just be UFS, it has to be UFS 2.0, surely. Then again I have no experience with partitioning or QFIL.
I was searching about a bit, and I found one recent thread about the x722's QFIL:
http://bbs.ydss.cn/thread-1104933-1-1.html
First post says this (via Google Translate):
This is just a theory, who knows if it actually works. Someone ought to try to restore their 32GB x722 with the Max 2 32GB's QFIL file (the internal storage size needs to correspond to your device's size).
It seems that even the Chinese are searching for QFIL files! It's weird that there's not a single QFIL file available for this device, free or paid. I know a lot of Chinese users like to hide files behind paywalls and such.
Now, I did find this, but it's paywalled, meaning you have to log in and probably buy it using the forum's currency or real currency:
http://www.bstdn.com/forum.php?mod=viewthread&tid=4852
This QFIL file is supposedly for the x722(?) but IDK if that's true or not.
I also found this thread:
http://www.18095.com/thread-382783-1-1.html
But when I log in with Weibo, it takes me to some newbie page, and I can't even access the forum. My user group probably can't view any threads. Weird. Chinese forums are so irritating.