Chords for 張懸 - 秦皇島 (萬能青年旅店) 20121225 客廳裡的老歌@女巫店 (). 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.