Once your phone boots, you will see the (not Chinese). You have successfully converted OPPO A57 China to Global firmware.
Some sellers sell Chinese models flashed with a modified firmware that "spoofs" the Global ROM. oppo a57 china to global firmware
Assuming you successfully manage to flash Global firmware or a custom ROM (via TWRP, if available for your specific security patch Once your phone boots, you will see the (not Chinese)
Modern OPPO devices have heavily restricted bootloaders, making cross-region flashing difficult or impossible without specialized authorized accounts. Once your phone boots
Usually done by turning off the phone and holding the Volume Up + Volume Down buttons while connecting it to a PC.
Before discussing the software, it is vital to understand the hardware. There are two distinct phones named "Oppo A57" that are often confused: