Maybe it's because almost all Hong Kong dramas are TVB actors, and TVB TV dramas are generally used by TV actors ... And actors have to go out on the street, and sometimes they can meet each other on the street ... And a TV series has a time limit, so they have to thank this and that, so they don't have time to broadcast the cast. And generally TVB official website can see the names and real names of the actors in this TV series on the Internet ... And I know that when the TV series starts, there are usually several activities to promote it ... TVB's entertainment channel will also broadcast some opening ceremonies ... and there is a TV series tour every year ... So, it is usually not very slow ... The TV series is about to start, and many people know the outline and actors. ...