There are no officially sanctioned casinos in Hong Kong. Still, the multiple cruises going through it have amazing ones as mentioned above, and people with a serious indulgence should visit nearby city Macau as a must too.

Gambling is strictly prohibited in the mainland of the People's Republic of China ( Mainland China ).

It has everything, all my research from all the police reports about Geri [McGee, the real-life showgirl on whom Stone's character was based], to the first-day call sheet, to the thank you notes from people on set. 

Martin Scorsese's film Casino (1995) is based on the Las Vegas careers of Spilotro and Rosenthal, on whom the characters Nicholas "Nicky" Santoro (played by Joe Pesci) and Ace Rothstein (played by Robert De Niro) were based.