To jam and learn 張敬軒 - 留低鎖匙 chords, your primary focus should be mastering these chords sequence: A, Dm, A, C#m, F#, B and E. For a smooth transition, initiate your practice at 71 BPM and gradually match the song's pace of 142 BPM. Configure the capo to your vocal range and chord preference, remembering the key of A Major.