post-concert       
adjective [ before noun ] (also postconcert) uk/ˌpəʊstˈkɒn.sət/ us/ˌpoʊstˈkɑːn.sɚt/
 音乐会后
happening after a concert (= a performance of music)
  They turned up for the post-concert bash. 
The curtain rises at 6 p.m., allowing plenty of time for postconcert dining.
 - More examples
 - Tickets for the post-concert dinner and dance are sold out, although there are still tickets for the concert itself.
 - During the post-concert interview, the composer explained how he had changed the opening chords.
 - The programming includes audience-friendly experiences such as pre- and post-concert chats with composers and performers.
 - We received a post-concert visit from our former teacher.