xbtmusic has opened an official invitation in HDB, the requirements are as follows:

HDB account for 5 years
HDB account level is 1080p or above
Average seeding time of 2 years
Applicants are from non-blacklist countries, blacklist:

Permanent Blacklist
DZ Algeria
EG Egypt
IR Iran
IQ Iraq
JO Jordan
KW Kuwait
LB Lebanon
LY Libya
MA Morocco
OM Oman
PK Pakistan
QA Qatar
RU Russia
SY Syria
TN Tunisia
YE Yemen

Registration Blacklist
BR Brazil
CN China
IN India
IL Israel
SA Saudi Arabia
TR Turkey
AE United Arab Emirates