Complex sentence: In 2017, the Line 10 platforms, which are over 94 meters below the ground opened, making China's deepest subway station become one of the deepest subway stations in the world after Arsenalna Station in the Kiev Metro.
Split into simpler sentences: In 2017, the Line 10 platforms, reaching over 94 meters below the ground opened. This made China's deepest subway station even deeper, becoming one of the deepest subway stations in the world after Arsenalna Station in the Kiev Metro.