1930-40s and 1980-90s
bbs.yntv.cn/thread-75174-1-1.html

1980s
dingshumin141.blog.163.com/[...]

1930-40s
bbs.voc.com.cn/topic-773270-1-1.html

1983
km165.blog.163.com/blog/static/32756402201041652419944/

I nominate this for best and most relevant thread on the site right now. Thanks for sharing, these are really fantastic.

I agree. The photos in the first link (liwei's) are fantastic quality too - it's really interesting to see how much has changed in the past 30 years (and I haven't even got to Kunming yet)

Thanks for the posts :)