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How to convert your Yukai DVD-V520IV player into a multi-region compatible machine
To change the region on this player
1. Press the Setup button on your remote control
2. Press the Next button on your remote control
3. Press the Previous button on your remote control
4. Press the Next button on your remote control
5. Press the Previous button on your remote control
6. You should now be in a secret menu where you can change the region using the Left and Right buttons on your remote control
7. Change the display to Ver 1 for region 1, Ver 2 for region 2, and so on, or Ver 255 for multi-region playback
8. Press the Setup button on your remote control