Translation issue: How would the Chinese "Ng" be pronounced in English?

Here in San Francisco, I’ve seen this on many business signs. And since I was a child watching the show, “Mystery Files of Shelby Woo”, I’ve always wondered how ‘ng’ would be pronounced in English.

I’m pretty sure that was the name of that show… It was on Nickelodeon when I was a kid. I put it in here because the actress that played the eponymous role had a last name of simply, “Ng”.