Can't immigrate to Newcastle, New South Wales?

It's not that you can't immigrate. If you apply for a general skilled immigrant like 175, there is no geographical difference.

The geographical scope you mentioned is the applicable area of remote areas in New South Wales as defined by the Immigration Bureau. Therefore, if you want to be a skilled immigrant in remote areas or be sponsored by relatives in remote areas, you must have studied in the above areas or your relatives live in the above areas to meet the requirements.

By the way, Wulong Palace is Wollongong, only the transliteration difference.