Hmm..so:
1. I download dev chinese rom (rooted) and install it via updater app. OK
2. I install flashify. OK
3. I install TWRP with Flashify, right?
4. I reboot. Now i have dev chinese rom rooted and TWRP.
5. I don't understand this. In multi rom's download page, it says "install with TWRP or...