Yes Ocean, the one you write about must be Wujiatang Wetland Park. It is the one signposted near Guandu.I went there yesterday and it's well worth visiting. Large area, wildfowl (moorhens, herons, yellow wagtails etc), very few people and peace (well relative peace, as there are constant overhead flights). It's well laid out with floating walkways and very attractive.

So within spitting distance of Guandu there are three wetland parks, two of which are open to the public and free:

Wujiatang Wetland Park and Baofeng Wetland

A link to Wujiatang Wetland Park:

en.kunming.cn/index/content/2009-07/08/content_1914541.htm

Ocean, I believe the park you are referring to must be a different one. After all Xihua, as the name implies, is on the West side of the lake. As I put on my previous post I have been trying to find it as I live near to Guandu Old Town. Apart from Kunming Dianchi PanAsia International Urban Wetland, which appears to be a private research facility, there is Baofeng Wetland, which I have visited several times and is worth a trip:
www.panoramio.com/photo/50755432

The place indicated on the roadsign, near Guandu is, I think but I will check, Wujiatang Wetland Park. I have yet to visit this place but maybe this is where you went.

I have tried to find this place and there is a sign directing you right as you approach Guandu Old Town. This led along a canal and then over a bridge to Kunming Dianchi PanAsia International Urban Wetland. There were guards who prevented us entering what seemed a pleasant part with some modern steel buildings. Around this park was some wetland that was accessible and made for a pleasant stroll. There were several fisherfolk and families but the walkways to the main island were closed off.

Could this be the same place? Is it going to be some new park or exclusive housing development? Any ideas?

A pity you didn't check out "The Deep" as it is well worth a visit.

That is, apart from the annoying Rolex sponsorship section at the end, which rather destroys the magic.