The upper part (file) of this combo photo taken by Pan Jiamin shows students of Shenzhen University having an architectural art lesson in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on Sept. 13, 2017 shows students of Shenzhen MSU-BIT University posing for a selfie after a semester-opening ceremony 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)