Need Help From China Expert

I am trying to ID the shown stamps and believe that most or all are from China. I'd appreciate any help in identifying these stamps. Thank you very much.
Pete

[EDIT: I left out "Northeastern Provinces" in Row 1. Sorry.]
Not a China expert, but...

The pics are really really small. I can't make out the denominations/overprints in some cases. In the future, please provide bigger pics. Put the stamps closer together before scanning to reduce total scan area, or scan them 1-2 at a time. Thank you.

Assuming you are using the Scott catalog:

Row 1: China(ROC) Northeastern Provinces #J1-J6(1947), I can't make out denominations, so you will have to do final ID

Row 2: China(PRC) East China Liberation Area #5L61, #5L60(30May1949)

Row 3: China(ROC) looks like #915, #919(1949), you confirm and do final Type ID

Row 4: both China(ROC) postal savings stamps, not Scott listed

Row 5: (left) China(ROC) postal savings stamp, not Scott listed -- there are 6 denominations in the basic set, so you have 3 of them
(right) too small, cannot read overprint

Row 6: (left) Japan #427(1948)
(right) China(PRC) South China #7L2(4Nov1949)

k

Hello Sir,
As I mentioned in some earlier posts, I am new to this great hobby and to this community online. I am continuously learning and every hint and advice is appreciated. With this in mind, I'd like to come back to you on three of the stamps you've looked at yesterday. They are the one stamp from my row 5, enlarged and hopefully identifiable to you. The other two are the stamps from my row 1. I don't have a Scott on China but one program I use is called Stamp Manager and it didn't show them at all. It only lists Scott numbers J43 - J101 for ROC. I'd very much appreciate if you could verify those numbers again. Thank You very much.
STILL LEARNING!
Pete
Round Rock, TEXAS

Hello Pete! So you are in Round Rock. I used to live in a suburb of Round Rock called Austin.

Thanks for the bigger pics.

I left out "Northeastern Provinces" for the description of the Row 1 stamps. Sorry. I have corrected my original post.

Row 1: China(ROC) Northeastern Provinces #J5($2) and J6($5)(1947)

Row 5: (right) China(PRC) East China #5L43(p12.5) or #5L43a(p13), you will have to measure perf to make final ID

k