Canonic Variations on "Vom Himmel hoch, da komm ich her", BWV 769 (in the sequence of the autograph) - Variation III: In Canone alla Settima (卡农变奏曲“从天堂我来到人世”，作品769 - 变奏3 - 回旋曲卡农) (in the sequence of the autograph)