A grand gathering is held to celebrate the 40th anniversary of the establishment of the Shenzhen Special Economic Zone in Shenzhen, South China's Guangdong province, Oct 14, 2020. [Photo/Xinhua]

- Shenzhen's achievements in reform and development come through trials and tribulations

- Shenzhen has acquired valuable experience in reform and opening-up

- Forty years of reform and opening-up of Shenzhen and other SEZs have created great miracles, accumulated valuable experience and deepened the understanding of the laws of building the SEZs of socialism with Chinese characteristics