The target hall of CSNS was roofed smoothly on September 11, 2015. By far, all the concrete structure buildings of CSNS have been smoothly roofed. 

The target hall is consisted of the top hall, 1# and 2# spectrometer halls. The roof of the spectrometer halls is of steel structure while that of the top hall is concrete due to the sealing and protection requirements. The construction and installation of the top hall are very complicated as the target, heating room and many other important equipments are located in this hall. 

The target hall is one of the key buildings of CSNS, which requires strict protection as mentioned above. The whole hall construction lasted about two years from 2013 to 2015. The smooth roofing of this hall creates excellent conditions for the completion of all the civil engineering construction work within this year.