The Unsolicited Electronic Messages Ordinance regulates the sending of unsolicited commercial electronic messages in Hong Kong. It came into force in December 2007.
All emails sent for marketing purposes should have a clear identification of the sender. The law requires you to have these as compulsory data to be mentioned in your marketing emails.
You can only send marketing emails to those who have provided implied consent to receive marketing emails from you.
There are large maximum fines that can be levied as penalties in the event of a breach that can go up to 1 million HKD and imprisonment for up to 5 years on conviction on indictment.
The fine and imprisonment depends on the regulating body and can vary based on what scale the law was breached.