Chords for 《红墙叹》Closing Song - Story of Yanxi Palace (EN/CN Subs) 《延禧攻略》片尾曲 - 胡夏 Hong Qiang Tan (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.