Anyone remotely interested in Hong Kong should read the novel Tai-Pan. That’s some great historical fiction. No idea which parts are accurate, but it’s a fun read.
I've watched the FX adaptation and the original from 1980, and I have to say I like the original a bit more. Neither one of them cannot match the book, which I rank in the same level with Lord of the Rings: thick books you cannot stop reading. The television adaptations are passable, but a bit disappointing if you are a fan of the book.
The recent Shōgun series was surprisingly good, I really enjoyed it.
Clavell famously has no idea how to end a book - they pretty much _all_ have a deus ex machina in the form of a natural disaster - but they are excellent & fun reads of the days & weeks leading up to it.
There is also a history book «Imperial Twilight: The Opium War and the End of China's Last Golden Age» by Stephen R. Platt who goes into events preceding the First Opium War (Macartney's mission to Qing's China in 1793) eventually leading up to the cession of Hong Kong island and the fall of the Qing. Whilst it is a history book, the way the events are narrated and how the story is presented make the book read as it were a fiction story (it is not). A great read all around.