The mark consists of a styled letter "H" within a styled circle ring. The left branch of the styled letter "H" tilts towards right. From the top, the color of the left branch of the styled letter H gradually changes from dark grey to light grey to white to light grey to white to dark grey. The right branch of the styled letter "H" tilts towards right. From the top, the color of the right branch of the styled letter "H" gradually changes from white to light grey to dark grey to light grey to white to light grey to dark grey to black. The top of the left branch of the styled letter "H" and the bottom of the right branch of the styled letter "H" are connected via a bar, whose color gradually changes from white to grey. The horizontal branch of the styled letter "H" lies in front of the bar connecting the left and right branches of the styled letter "H". The color of the horizontal branch is grey with gradual changes. The color of the ring around the styled letter "H" is grey with gradual changes. The outer side of the ring, from 12 o'clock position, clockwise, changes from dark grey to light grey gradually. The inner side of the ring, from 6 o'clock position, clockwise, changes from dark grey to light grey gradually. A narrow while seam lies between the inner side and outer side of the ring. The bottom left corner and top right corner of the styled letter "H" lie in front of the ring. To the right of the styled letter H and the ring, lie three letters: "HLN", whose colors change from dark grey to light grey to dark grey from top to bottom.