The upper part (file) of this combo photo taken by Huang Jianqiu shows a science park in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on July 27, 2016 shows a science park zone in Shenzhen. 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)