The mark consists of The overall design is a unified combination of the Arabic numeral "4" and concentric rings (target shape). The numeral "4" uses a bold, rounded font, with the lower right stroke seamlessly merging with the left side of the rings to create a continuous, unbroken shape. The rings, from the outside in, consist of a thick black outer ring, a white ring, a thin black inner ring, and another white ring, culminating in a solid black dot at the very center, forming a distinct concentric structure.