Yi Chang is the Dean of the School of Artificial Intelligence, Jilin University, China. Prior to this, he was Technical Vice President at Huawei Research America, and Research Director at Yahoo Research. His research interests include information retrieval, data mining, machine learning, natural language processing, and artificial intelligence. He has published more than 100 papers on premium conferences or journals, and was elected as an ACM Distinguished Scientist in 2018 for his contributions to intelligent algorithms for search engines.Hongbo Deng is Senior Staff Engineer and Director in the Search and Recommendation Business Unit at Alibaba Group. Before that, he was a senior software engineer at Google, and a senior research scientist at Yahoo! Labs. His research interests include information retrieval, web search, data mining, recommendation system, natural language processing. He won the Best Paper Award in SIGKDD 2016, and the Vannevar Bush Best Paper Award in JCDL 2012. He is a senior member of ACM.

• 1. An Introduction to Query Understanding.- 2. Query Classification.- 3. Query Segmentation and Tagging.- 4. Query Intent Understanding.- 5. Query Spelling Correction.- 6. Query Rewriting.- 7. Query Auto-Completion.- 8. Query Suggestion.- 9. Future Directions of Query Understanding.

Yi Chang is the Dean of the School of Artificial Intelligence, Jilin University, China. Prior to this, he was Technical Vice President at Huawei Research America, and Research Director at Yahoo Research. His research interests include information retrieval, data mining, machine learning, natural language processing, and artificial intelligence. He has published more than 100 papers on premium conferences or journals, and was elected as an ACM Distinguished Scientist in 2018 for his contributions to intelligent algorithms for search engines.Hongbo Deng is Senior Staff Engineer and Director in the Search and Recommendation Business Unit at Alibaba Group. Before that, he was a senior software engineer at Google, and a senior research scientist at Yahoo! Labs. His research interests include information retrieval, web search, data mining, recommendation system, natural language processing. He won the Best Paper Award in SIGKDD 2016, and the Vannevar Bush Best Paper Award in JCDL 2012. He is a senior member of ACM.

• 1. An Introduction to Query Understanding.- 2. Query Classification.- 3. Query Segmentation and Tagging.- 4. Query Intent Understanding.- 5. Query Spelling Correction.- 6. Query Rewriting.- 7. Query Auto-Completion.- 8. Query Suggestion.- 9. Future Directions of Query Understanding.

Yi Chang is the Dean of the School of Artificial Intelligence, Jilin University, China. Prior to this, he was Technical Vice President at Huawei Research America, and Research Director at Yahoo Research. His research interests include information retrieval, data mining, machine learning, natural language processing, and artificial intelligence. He has published more than 100 papers on premium conferences or journals, and was elected as an ACM Distinguished Scientist in 2018 for his contributions to intelligent algorithms for search engines.Hongbo Deng is Senior Staff Engineer and Director in the Search and Recommendation Business Unit at Alibaba Group. Before that, he was a senior software engineer at Google, and a senior research scientist at Yahoo! Labs. His research interests include information retrieval, web search, data mining, recommendation system, natural language processing. He won the Best Paper Award in SIGKDD 2016, and the Vannevar Bush Best Paper Award in JCDL 2012. He is a senior member of ACM.

• 1. An Introduction to Query Understanding.- 2. Query Classification.- 3. Query Segmentation and Tagging.- 4. Query Intent Understanding.- 5. Query Spelling Correction.- 6. Query Rewriting.- 7. Query Auto-Completion.- 8. Query Suggestion.- 9. Future Directions of Query Understanding.