Transit hotel or lounges in Kunming International Airport?

I'm travelling Chengdu to Kolkata via Kunming and have whole night layover at Kunming International Airport. Is there a transit hotel in this airport or lounges for sleeping over the night? If yes, what are usual charges? If not, what are other options? I have a China Residence Permit so I can go out of airport without issue but I would prefer a transit hotel or lounge inside airport for convenience.
Thanks.