There is not an above ground Satanic group in Hong Kong. It is not safe to physically meet people. There are infiltrators who would love to see a Satanist killed or brought to ruin. If people know you are a Satanist they will not hire you for a job, fire you if you have one, harass or attack you, or even try to kill you. These groups are for communicating with other Satanists and do not endanger your safety like a physical meeting would.