Gambling is not something that started from a particular region, I know that every region will have there own gambling history just like Rome where many people thinks that gambling started from. We need to take a lone at Egypt where was recorded that gambling had been for long during bc.
We all have different options when. We we start talking about gambling and getting to know and have a random ideas about the history, then we might not leave because gambling is so broad that we can't gather all these information.
I completely agree, however, I didnt said that gambling started from a particular region, what I said was that the first written proof ever recorded was "the book of songs" which was written in China. Nontheless this doesnt mean that it was something that satred in China rather than it most probably was imported to china.