Here’s a solution that I use for my J1s
Buy 2trn, minor
Sz6
ss, 2dds, and all air from sz6
Sz35
ss, dd, bb sz19
bb sz6
Sz37
ftr formosa
ca sz20
2bmb Japan
Phi
ftr, tac sz33
inf Oki & art Man
2inf Kiangsi
Yunnan
2inf, art Kwangsi
ftr, tac Kiangsu
Kwangtung
inf Kwangsi
inf Kiangsi
ftr, tac Manchuria
ftr Oki
tac Japan
Hunan
art Kiangsi
ftr, tac Manchuria
tac Japan
Walkins
inf Shantung -> Anhwe
inf Jehol -> Chahar
inf Japan, inf Iwo -> Wake
2inf Siam -> FIC
NCM
2 carries sz6 -> sz31
dd sz33 -> sz31
dd sz33 -> sz35
ca in sz6 stays unless there’s no threat to sz6 (alternately could be swapped with dd in sz31)
all air Yunnan, Hunan, Kwangtung to Kwangsi
bombers to Kwangsi
inf/art to Kiangsi (if needed to make sure sz35 transports are full)
consolidate rest of inf/art and mech in Anhwe
shuffle troops from man to Jehol and Korea to Man
3 unmoved ftrs to where their defense might be needed to
- protect sz6 transport builds
- replace any air losses in sz26 to bring carriers up to complement
- otherwise move to Kwangsi
Tips & Hints
I’ve left 3 carriers, dd, ca, and 3 ftrs for nocom on purpose. If Hawaii air is scrambled, you could lose all your ships. If this happens, you could block sz26 with the unmoved dd. If there’s no scramblers, your trn builds could be hit - so you need some of those fighters in Japan and maybe the cruiser or dd if you want em. Alternately, those fighters could replace any air losses on your 2 carriers if sz26 goes really really wrong.
You need to keep the cruiser in sz37 to block UK from hitting FIC. Otherwise you lose the only ground forces that could hit Yunnan J2. Plus FIC is a great location for a minor placement on J2. Place the minor you built on J1 in Shantung and start pumping out mech/arm.
This opener is obviously pretty aggressive and could allow China to get strong as it’s light on troops in SE China. This is why I recommend getting that 2nd minor down in FIC on J2. Pump mech/arm out of Shantung and inf/art out of FIC.