Need Help With China Stamps

Good evening all,

Those who have read my posts probably realize I'm pretty well versed with U.S. material.

What I do not know is any other country's stamps.

Hence, this is why I need help. Our club recently received a large donation lot and we're working our way through it. I found these stamps, along with about twenty other in an envelope saying they were "...worth a bundle..." This envelope hasn't been touched in probably thirty years or longer.

Any information you can give me on the value of these stamps would be greatly appreciated.

Here they are:

Try www.imperialchinastamps.com . It is one website you might try. I found the first two of your stamps there,

Peter

The lower 3 stamps are listed in the Stanley Gibbons catalogue under Communist China. D. North-East China People's Post. Issued in 1947 for Labour Day, showing a Peasant and Workman (SG NE152-154), mint copies £4 to £5.

Labour Day
Sc# 1L24 to 26 set $9 2009
Imperf pairs set $425

Thank you to everyone who replied. I'm always skeptical about old markings on envelopes like this, but being an area I didn't know, I figured I better ask.

I like the red cancel on the first coiling dragon stamp, although I couldn't recognize it.