The upper part (file) of this combo photo taken by Zhang Yiwen shows Nanyou development zone in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on June 20, 2018 shows a new look of the area. This year marks the 40th anniversary of China's reform and opening-up policy. Over the past four decades, Shenzhen has developed from a small fishing village to a metropolis. (Xinhua)