Not to familiar with the Kunming bread situation anymore because I simply make my own bread, but as far as I know “good bread”, that is bread without a sweet flavour like all Chinese breads, is available at Igor’s bakery and it is sold as well at Salvadors/Mimosa.

The Wicker Basket shops as well sell a rather bland but not sweet loaf of bread.

A friend of mine gets quite good results himself with a bread making machine, like me, he buys his ingredients on line.

I don’t know about German bread but pumpernickel style bread is available online of the Jason brand which is not bad and at least not sweet.

I was pleasantly surprised when I just recently discovered that they had Roggenvollkornbrot and Sonnenblumenbrot at the Hema grocery store in shuncheng mall (盒马，顺城购物中心). Don't know if that's what you mean by German bread, but thought I'd mention it. :)