Both HK and China version (make sure it's DTS, DVD-9) are region free.
HK version will say it's region 3 but actually it's all region
China version is a bit tricky. The first version (not DTS) is PAL format so you can not watch it on your DVD player unless it's PAL-compatible. The second release is NTSC and region free.
I just got China version and it's perfect
