Resize System partition

Steps:
1. Download "parted and platform-tools" in "UiX city" and add file in "platform-tools"

2. Reboot your phone to twrp then open CMD in platform-tools
3. In CMD:
adb push parted /sbin

adb shell

chmod 777 /sbin/parted

parted /dev/block/sdc

p

We can see your partitions
Delete "system" and "userdata"

rm 40
rm 46

Create system partition

mkpart
system
ext4
7828
16020

Create userdata partition

mkpart
userdata
ext4
16G
(your amount of memory(64G/128G/256G)
128G

4. In twrp wipe system and data. Reboot recovery
5. Flash DFE format data (yes), and reboot recovery
6. Flash your rom