The producer should do some background research on the OCTB. It isn't a divisional formation. It is an HQs formation under Crime Wing and the commander is a Chief Superintendent. In this drama, OCTB looks more like an under-staffed district crime unit. The ridiculous part is that a senior inspector is the superior of an inspector. In reality, they are of the same rank. And there is no detective sergeant in the team. Perhaps, the D sergeant has been upgraded to a detective inspector. Very funny.
Foh Si or Fire Shit is a superb portrayal of Triad Head. Han Pun, too. these two actors are indeed veterans. the modern or new actorsh are no where near these veteran bad guys