Interestingly,unknown to me, the guide you recommended was the chap my brother had already made contact with!
He had suggested Yancheng Reserve for 2 nights, 2+days and a 5hr car drive for what sounded like a steep 7500Yuan/US$1200 for the whole package.
As this picture shows - somethings are hard to swallow but maybe that's the price for 2.5 days birding in China!
Many thanks for your help
,
Eric