To learn 譚詠麟 - 霧之戀 chords, these are the chords to practise in sequence: Em, A, D, Bm, G, A, D and G. I suggest starting at a calm pace of 74 BPM, and as you gain confidence, approach the song's BPM of 149. Adjust the capo based on your vocal range and chord preference, keeping the song's key of D Minor in mind.