I have recently acquired a Chinese (Tozed) 5G CPE <(http://www.sztozed.com/en/contents/104/120.html)> with MTK 750 Chipset. I have observed it comes with Busybox 1.30 and running on Openwrt 19.07. (See Picture)
I am able to open terminal and get access to admin console using usual passwords. However, i am not able to get in to SU as it is asking for one more password which i am not able to figure out.
Is there any way i can root access in this situation? Thank you for your support.
its not a real OpenWRT firmware, so you are basically out of luck here in this forum.
Besides checking some Chinese forums (e.g. with google translate) you could go through the OpenWRT installation instructions of supported redmi and xiaomi device that have official real OpenWRT support on the respective OpenWRT wiki pages. Usually all those Chinese devices get installed and rooted via some kind of glitch or security bug. Maybe one of these glitches works for your device as well.