BeiPing 1940, v.1.0.0
(I'm playing OoB v.5.2.3/64bit with my mod, but this shouldn't matter in this scenario, as I didn't change any of the units you used)
My first time around this map, played at middle difficulty. Some observations:

- Midplay
- Screenshot 108.jpg (554.72 KiB) Viewed 9217 times
- nice map, good action, never boring
- the prim. obj. hint was hilarious, at least to me.... "do it"...
- many different approaches with good flanking and encirclement tactics possible
- the first 10 turns defending were intense and well balanced. And I liked the "traitor" ideas...
- really liked the airplane harassment throughout, but still missed some kind of AA early on
- the one-and-only arty seemed pointless as it was destroyed by planes real fast. Same goes for one of the AT-guns that had no "concealed" trait
- the provided fighter plane was kind of useless against the Jap. fighters. Only after capturing all airfields and thus cutting the enemy planes' support, that fighter actually did some damage (too late in the game)
- fast AI & map, good settings, fast gameplay. Simple but effective
- good overall balance and turn limit
- all objectives checked "complete" okay
- the "choke point" at ShanHaiGuan is well done, the counter-attack fierce. I took it at turn 25, my AT-support arrived a tad late, most of the tanks were destroyed by inf. units and encirclements
- the RP management was good, but I felt like having too many units at some later point and thus being able to overrun the last two primary VP's

- Soko-Ko.jpg (452.07 KiB) Viewed 9217 times
suggestions
- add an objective marker on WuGui and make it an prim. victory point! Speaking of which, add obj. markers to all prim. obj.!
- I liked your logic with the "Quick" trigger
- the Jap. ships should be able to move to support the defense of ShanHaiGuan instead of staying south
- I'd scratch the last reinforcement wave (turn 40) completely, or make it dependent on the player's progress on the map
- The Soko-...-Ki tank was rendered useless as it was now (see above screenshot)
- maybe you could expand the railroad to reach a bit further west after ShanHaiGuan. Or add transports to the heavy inf. and the AA at least
- a sec. obj. would be neat - maybe "destroy all enemy tanks" or something like that, with a nice reward
- none of the popup messages had pics in it. Add some, it looks better

- Screenshot 111.jpg (462.79 KiB) Viewed 9217 times
As always these are just my own opinions.
Thank you for this, Duplex, I had fun, it was time well spent.