I don't have a direct answer, but some of the hotels are cheaper than the hostels. There is an international hotel that you can see from Kunming main railway station, on Beijing Lu. I was told that it was cheaper than one of the main hostels in Kunming. I am told that as you stand outside the railway station you will see the name of the hotel (in English) using the word international, on the side or top of the building.

I am sorry that I cannot remember the full name of the hotel, or answer your question more specifically.

Some of the local stores sell at the lowest possible price, you get the lowest quality, and both can be very low. It is worth the journey to the decorating markets, and finding trade suppliers, or the extra money at B&Q, or buy online.

If you have not water, speak to the building management, they will know of any problems with the supply. If there is, they will know if and when there is a water bowser delivering water to your development, you will need to go down and queue with your bucket.
They will also be able to tell you if your water has been cut off for any other reason, like the owner has not paid the bill.

I have been contacted by one Wechat group now, thanks Haali.

Within Chinese culture, jade has an intrinsic value that is not related to any great rarity. I was given a jade toy, that was valued at 60 000 rmb 10 years ago. I know someone with an 'antique' jade bead bracelet valued at 200 000. Personally, I think it is overvalued, with prices driven by the nouveau riche, collectors, conspicuous consumption, and in some cases blind avarice. I have read that the piece concerned, priced at 45k was valued at 26k.
Now gold (not jewelry) is a bit more universally recognized and easy to value correctly.