A Deeply Buried Narrow-line Seyfert 1 Nucleus Uncovered in Scattered Light

National Natural Science Foundation of China [NSFC-11473025, 11573024, 11421303, NSFC-11773036, NSFC-11233002]; National Basic Research Program of China (the 973 Program) [2013CB834905]; Natural Science Foundation of Anhui [1808085MA24]; Strategic Priority Research Program, Emergence of Cosmological Structures, National Astronomical Observatories, Chinese Academy of Sciences [XDB09000000]; Special Fund for Astronomy from the Ministry of Finance; Alfred P. Sloan Foundation; National Science Foundation; U.S. Department of Energy Office of Science