According to allkpop.com, allegedly the event was cancelled for no reason two days ago:
The ‘Hunger Games’ Asia tour, originally scheduled for November and featuring Jennifer Lawrence, Josh Hutcherson, Liam Hemsworth, and director Francis Lawrence, has canceled its visit to Korea… Distributor Lionsgate Films will be making a more detailed announcement on the situation later.
For now, this is not confirmed by anyone from Lionsgate. As you know the cast were due to visit Beijing, China and Seoul, Korea Republic before holding the World Premiere in London, UK. We were very excited for Asian fans and understand that this may be very disappointing news.