In the center of Zhengzhou, the high-rise Erqi Memorial Tower is particularly striking in the surrounding commercial buildings. This is the symbol of this heroic city. Zhengzhou Erqi District is also the only city in the country named after the historical events of the revolution. The 27th Memorial Tower is called the 27th Strike Memorial Tower in Zhengzhou. It was built to commemorate the 27th Strike on February 7, 1923. It is located in Zhengzhou Erqi Square, Henan. It was built in 1971. It is a unique antique joint tower of Chinese architecture. It is a memorial building built to commemorate the Great Strike of Beijing-Hannity Railway Workers. It was listed as the national key cultural relics protection unit in 2006, and China's youngest national key cultural relics protection unit (the current 27th Memorial Tower was built in 1971 and is 50 years old).