did you not manage to get the correct firmware from 4PDA the russian forun mentioned in the chinaphonearena thread you linked...?Does anyone know if you can flash the rom using the sp-flash tool or SPMDT tool to put a custom rom on this brand of phone with firmware above? rather than using twrp?
If I'm able to do that might be able to use this bloody phone! Otherwise I'll just have to use it as an expensive paper weight! :(