The length of a circle is also the circumference of the circle, which can be calculated according to the formula for the circumference of a circle, i.e. C=3.14x diameter or C=2x3.14x radius. Dalian Zhongshan Square, a total area of 22,000 square meters, 168 meters in diameter. That is to say 3.14 * 168 (diameter) = 527.52.
The disc protruding from the center of the square is an open-air stage, a public **** recreation place for the public. Most of the buildings around the square were built during the Russo-Japanese period, and most of them are now used by financial institutions, such as the People's Bank of China, the Bank of China, the Industrial and Commercial Bank of China, the Bank of Communications, and the Trust and Investment Bank, and so on, which makes this place the financial center of Dalian as well.