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The highest speed currently attained in scheduled revenue operation is on the Beijing–Tianjin Intercity Rail and Wuhan–Guangzhou High-Speed Railway systems in China .
 Beijing–Tianjin Intercity Rail, Wuhan–Guangzhou High-Speed Railway, China
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Beijing–Tianjin Intercity Rail, Wuhan–Guangzhou High-Speed Railway, China