In Question about fleets
A side can claim control of those cities (Shanghai, Peking, Tientsin) as long as the side has at least 1 unit in the hex.
In About cut off
Please add "Units in a supply center, or a port / naval base (for player with navy in the game) are never cut off" to 12.2
Rule 6.0 restrict both sides stacking only on turn 0. It should be changed ?
Can both sides receive supply from those cities ?