Complex sentence: The second-tallest building in the city is Shun Hing Square, (invariably known as the Diwang Building) which stands tall with 69 stories, has been the tallest building in the city and tallest all-steel building in China since its completion in 1996.
Split into simpler sentences: The second-tallest building is Shun Hing Square (locally known as the Diwang Building), which stands with 69 stories,. It is the tallest all-steel building in China since its completion in 1996.