300 test queries are randomly selected out, and annotators are asked to independently score the results of these queries with different points in terms of their quality: (1) Good (3 points): The response is grammatical, semantically relevant to the query, and more importantly informative and interesting; (2) Acceptable (2 points): The response is grammatical, semantically relevant to the query, but too trivial or generic (e.g.,“我不知道(I don't know)", “我也是(Me too)”, “我喜欢(I like it)" etc.); (3) Failed (1 point): The response has grammar mistakes or irrelevant to the query. 
 Question: How is human evaluation performed, what were the criteria?
(1) Good (3 points): The response is grammatical, semantically relevant to the query, and more importantly informative and interesting (2) Acceptable (2 points): The response is grammatical, semantically relevant to the query, but too trivial or generic (3) Failed (1 point): The response has grammar mistakes or irrelevant to the query