The CW is sending some oil to the Chinese. In the final production step, the Chinese decided that they did not want to spend that oil, but wanted to save it instead. (Next turn it is may be worth two BPs, this turn only one.) To my surprise, MWiF would not let me do this, stating "Which resources are used to fulfill trade agreements may not be changed once the Final Production Planning phase begins."
I am not sure why this restriction exists. In any case, the Chinese do not want to change which resource is being used to fulfill the trade agreement, they just want to change what they do with it once they get it.
(Easy work around: save the game in the Break down units step, and make any changes to trade agreements there. Even though I can get around this problem, it still should not exist.)
I thought I knew how to play this game....
