Help With China Stamps

ive been sorting a bunch of China of which I know knowing about and have been stumped on these. Can anyone point me to the correct Scott catalog area for the below? Help much appreciated..












The bottom 2 I was thinking air post, PRC. But not sure on the 'FEN' script. The top two ??

Google lens will point you in the right direction.

My gut tells me:
1. China in Taiwan (Formosa) section.
2. China 1L section... I think at back of People's Republic of China section.
3. Manchukuo.
4. Republic of China year 1946

I don't have my catalog to give a better answer.

Whoops - disnt mean to lit the formosa one there! Let me check the others - get back to you…. Many thanks!! #128522;

hummm, and I thought Formosa would be the easy one. I working with 2019 Sc catalogs. China - Taiwan (Formosa), p. 380, dont see it. If I look. for Formosa in index, reads pages 310 & 380. 310 is Republic of China, Taiwan. Not there.

Little confused here.

This one I see in PRC, image A3




But I cannot fine the $1000 denomination.

EDIT: Not sure why I struck out on the 1st search ! Its a reprint , 1950 Sc1L136

in my 2019 cat, this one




is China, Sc780, 1947.

Stamp #4 is indeed China Scott #780.

Stamp #2 is Northeast China 1L136. It is design A3, but has the 4 characters added to signify "Northeast Postal Service". Perhaps a reprint?

Stamp #3 is Manchukuo... Scott #C4.

Stamp #1 appears to be something Scott doesn't list. Perhaps it is a local issue.

Got it! Thanks for hanging in there with.......