i mailed IBF about the World Grand Prix Final, it turned out that the event in Ningbo is probably the China Open. here is the reply i got:

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As for the GP Finals, I think there must have been some crossed wires!
There is an event due to be held in Ningbo in September, but this is the
China Open. I understand it's being billed as a "Super Grand Prix" or
something like that, as a result of some presentational enhancements they
have planned.

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thanks you Lindsey for the clarification...

Heh!
so I was right. :)
It wasn't the WGPF

My guess is WGPF will be held in Aug replacing the Brunei Open - that is if it gets to be held.

hopefully.