What To Do With Old Chinese Stamp Sheets? I'm Not A Collector. Thanks For Any Help You Can Provide.

These stamps have been in an envelope in a drawer for 70+ years. I would like to see them end up in collections. I'm wondering how/where to sell them? And if I should seperate individual stamps or keep the sheets intact? Also would these stamps be appreciated more by a Chinese collector? Ifso are there sites/forums?

Have you had any ancestors serving in WWII under Gen. MacArthur, please? I'm curious about the provenance of the stamps ...

My Grandfather was in the Navy during WWII. I would need to look up dates if needed. The stamps were found in an envelope along with other items from his time in the service. I know he spent a lot of time in the S Pacific. But not sure if he was ever in China. He did brag about circumnavigating the globe.

Do your best to find any evidence possible of him buying the stamps! That will increase their appeal and, of course, their price.
Don't try to sell them uncertified - see Philatelic Foundation or American Philatelic Society.

These look like Japanese occupation overprints of North China (Hua Bei) on New Peking printed stamps. Keep the stamp sheets intact and do not break them down. You can try the following website: www.chinastampsociety.org

The Japanese Sun
US did offer support to China and, once Japan was defeated, US personnel was sent as advisors and instructors to anti-communist factions. So, depending on where the grandad has served, it might be possible to have purchased the stamps himself.
If he only bragged about circumnavigating the world, but without giving details of his wartime, then I wouldn't be surprised to find he worked for the Office of Strategic Services of the era
Some of the archives are now available to the public.

Thanks for the advice and information. My Grandfather only talked about a few experiences of his time during WW2. I'll get the stamps certified. Not sure how I can prove he purchased them. In the same envelope he had chinese currency and what looks like horse race results from Nov. 18 1945. Its not stamps, but some of you might find it interesting.

The last one shown is either Scott catalog number 4N28 or 4N38 (can't quite tell from the pic, but I think the first one). The first two may be 4N29 and 4N30. These is some value here, do not break up the pieces.

Mew2018, the race results are from Tsingtao Horse Club, the city of Tsingtao - now Qingdao. It was under Japanese occupation in WWII.
To my knowledge, in the years after WWII, US Military did run huge operations on that side of China, among others helping repatriate over half-Million Japanese and Korean civilians left behind after Japanese capitulation (and risking to become victims of national cleansing) ...
So, there you go: your grandad was in a way or another part of the above! Isn't Philately amazing?

Never a truer word spoken.

Here is a page that shows some of your stamps: https://stampauctionnetwork.com/v/v5018146.cfm