There are reported to be something like a dozen peaks over 5,000 meters in the Jade Dragon massif. A mini-mountain range it is.
About the climbing ban, I offer the following. There are two types of wardens that I am aware of. The first are fire wardens who man stations on certain roads in the general Lijiang area.
I have encountered them on the road to Puji Temple, also above Nanyao Village north of Lashi Lake. I was on the way down and out, so they didn't bother with me at all. One of them told me his job was to stop traffic attempting to pass through during the dry season, generally November to May and perhaps as late as mid-June. I presume he allowed known local residents to go on through. I noticed that he left his station after 5:00pm.
There may be fire wardens in the Yuhu Village area or areas to the east of Jade Dragon Snow Mt, but I have no knowledge. All I can say is that on several trips in the dry season I have never encountered fire wardens on any of the roads or trails from the Yuhu Village area up to Jade Dragon Reservoir and then down to Wenhai Lake.
The other type of warden might be called mountain wardens. A trekker friend encountered one at Yuhu Village, and the message was clear: no climbing on Jade Dragon Snow Mountain. My friend hired a guide and did a long day trek from Yuhu reaching above 4,000 meters. Apparently this is an acceptable practice. Limited details about treks from Yuhu Village may be found here:
Another friend, a guide in Lijiang, told me that if one is caught camping
on these hiking routes above Yuhu, you might well be told to get off the mountain.