This a simple set of numbers that players enter into a section of casino website to show that they have fulfilled some conditions to qualify for a reward. The code may be earned in the casino or an affiliate. Each code earns a different reward but all benefit the player by allowing them to play for free.
Hong Kong is a specially administered region of the People's Republic of China. It is famed for it robust economy and cosmopolitan lifestyle due to its development under British rule, which ended in 1997. Gambling laws in Hong Long are quite strict, and many people have turned to online gambling instead.