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The 301 national highway which connects Hailar and Manchuria was built and put into use , and the trial voyage for shipping on the Erguna river was successful .
 national, Hailar, Manchuria, The 301 national highway which connects Hailar and Manchuria, which connects Hailar and Manchuria, the Erguna river
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: geographical social political, organization, person, location, facility, vehicle, weapon 
Text: {0} 
Answer:
 national, Hailar, Manchuria, The 301 national highway which connects Hailar and Manchuria, which connects Hailar and Manchuria, the Erguna river