The left part (file) of this combo photo taken by Lo Ping Fai shows a joint inspection building in Shenzhen, south China's Guangdong Province. The right part of the combo photo taken by Mao Siqian on June 12, 2018 shows a joint inspection building zone of Luohu Port 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)