What does the Shenzhen subway sign mean?

On the whole, the new Shenzhen Railway brand LOGO has inherited the old design concept, and made a breakthrough, removing the peripheral circular shell, while retaining the original iconic double-track, semi-circular and flat monochrome treatment. While highlighting the core elements of Shenzhen Metro, it shows a trend of breaking through tradition, daring to innovate, extending outward and being open and inclusive. Among them, semicircles and straight lines are like tunnels and tracks, the upper and lower arcs are urban interactions, and the two straight lines in the middle represent the intersection of roads, which intuitively reflects rail transit.