century; that’s a blink of the eye in the history of the universe and life on this planet. We are beginning to explore tiny regions of the large parameter space of possible technosignatures from potential extraterrestrial civilizations[@2018AJ....156..260W]. Even though we are in an infant stage, SETI science and technology is growing exponentially. Radio telescope sensitivity has been doubling every 3.6 years for the last 60 years, and SETI spectometer capabilities have been doubling every 20 months for the last fourty years. This SETI sky survey commissioning work is a significant step, leading to a powerful new SETI survey on FAST.

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We sincerely appreciate the referee’s rapid, thorough, and thoughtful response, which helped us greatly improve our manuscript. This work was supported by National Key R$\&$D Program of China (2017YFA0402600), the National Science Foundation of China (Grants No. 11573006, 11528306, 11803054, 11690024, 11725313), the China Academy of Sciences international Partnership Program No. 114A11KYSB20160008, Berkeley’s Marilyn and Watson Alberts SETI Chair funds, the Berkeley SETI Research Center, and the Radio Astronomy Laboratory at Berkeley. This work was also supported by National Astronomical Observatories, Chinese Academy of Sciences, and its FAST group. During this work EJK and JC were supported 