9187
Hong Kong police regularly catch hundreds of illegal immigrants and people who have overstayed their visas from mainland China and send them back .
 location: China; location: Hong Kong
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
 Entities: China, Hong Kong 
Answer:
 location: China; location: Hong Kong