To learn 半世墨痕 - 清秋梦 chords, these are the chords to practise in sequence: Cm, Gm, Cm, Ab and Gm. A good strategy is to initiate at 87 BPM and then accelerate to the track's regular speed of 175 BPM. Adjust the capo based on your vocal range and chord preference, keeping the song's key of C Minor in mind.