I find out one exploit

[RodrigoKenji]

If you start training then go to your windowns clock and fast foward 8 hours this will take affect in game.
Soo you just can skip the 8 hours waiting time.

[King_Jamiu_10]

Hi,

Indeed this affects the timers in the game but not on database, if you do the above and try to complete the training you'll get an error message that the countdown isn't complete!