Hi! I speak the same language as you too.
Anyway. Yes that true. HK ps2 cannot play any online games. SONY HK have no support for any online games in HK. There is a tool called Machine ID Changer. This tool allow you to change you machine id to other version id so that you can play different version online games. For example change you HK ps2 id to US id so that you HK ps2 can play US online games. I did the same thing to my 30006R HK ps2 to play US online games with no problem. BUT..... the bad thing is Machine ID Changer don NOT support 5xxxx series ps2. It work great on all 3xxxx ps2 but just not 5xxxx. So.... there is no way to change 5xxxx ps2 id unless a new version machine id changer release.
If you have 3xxxx ps2 = online able, 5xxxx ps2.... better wait or exchange with someone or frds for a US or 3xxxx ps2.
SCPH-10000 with Messiah 2 Pro 1.30 + Ext. BB Unit
SCPH-30006R + DMS3 v2.0 fw 2.3
SCPH-30000 + MI fw 1.45
DTL-H30001 GH-004 v1