Humanitarian aid from North Korea's neighbors has been cut off at times in order to provoke North Korea into resuming boycotted talks. For example, South Korea decided to "postpone consideration" of 500,000 tons of rice for the North in 2006, but the idea of providing food as a clear incentive (as opposed to resuming "general humanitarian aid") has been avoided.[64] There have also been aid disruptions due to widespread theft of railway cars used by mainland China to deliver food relief.[65]