579
Chinese Foreign Ministry spokesman Liu Jianchao refused to provide details , but said the talks were `` conducive to mutual understanding and finding ways to resolve the North Korean nuclear question peacefully .''
 None
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: meet 
  Option: entity, place 
Text: {0} 
Answer:
 None