121708
It was set in Chongqing during the Chinese Civil War in 1949 , and featured underground communist agents under the command of Zhou Enlai fighting an espionage battle against the Kuomintang .
 Chongqing, communist, Zhou Enlai, Kuomintang
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chongqing, communist, Zhou Enlai, Kuomintang