What does the circle drawn in the story of spring mean?

Shenzhen, the first special economic zone. "Spring" refers to "the spring of reform and opening up", which also means "the beginning of reform", because when the author Jiang Kairu first arrived in Shenzhen, Shenzhen was surrounded by barbed wire. He described the establishment of the Shenzhen Special Economic Zone as "drawing a circle" ". "The first spring" refers to the great decision of reform and opening up made at the Third Plenary Session of the 11th Central Committee of the Communist Party of China. Shenzhen is the window for China's reform and opening up and an emerging immigrant city. It has developed into a modern and international metropolis with certain influence, creating the world-renowned "Shenzhen Speed". "The Story of Spring" is a song written by Jiang Kairu and Ye Xuquan, composed by Wang Yougui, and arranged by Zhang Hongguang. It was first sung by Shenzhen female singer Liu Shaowen at the finals of the Guangdong Provincial Youth Song Composition Competition, and the version premiered on CCTV in October 1994 was sung by Dong Wenhua.