The upper part (file) of this combo photo taken by Chen Xuesi shows taxies in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on June 24, 2018 shows electric taxies in Shenzhen. As of this April, the number of electric taxies in Shenzhen has topped 13,000.

The upper part (file) of this combo photo taken by Pan Jiamin shows an old terminal of Shenzhen airport in south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on Nov. 28, 2013 shows a new terminal of the airport in Shenzhen.

The upper part (file) of this combo photo taken by Pan Jiamin shows the Bamboo Garden Hotel in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on Oct. 10, 2016 shows the Qianhai Shenzhen-Hong Kong Youth Innovation and Entrepreneur Hub in Shenzhen. This year marks the 40th anniversary of China's reform and opening-up policy.

The upper part (file) of this combo photo taken by Yang Shaoming shows people selecting goods at a shopping street in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on Dec. 7, 2015 shows customers buying food at the CTFHOKO shopping mall in Shenzhen.

The upper part (file) of this combo photo taken by Zhou Jiaguo shows a volunteer doctor examining an aged woman at a community in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on May 8, 2018 shows a volunteer helping a passenger use a smartphone-generated QR code to buy ticket in Shenzhen Metro.

The upper part (file) of this combo photo taken by Pan Jiamin shows a resident watering flowers in Yumin village in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on Sept. 7, 2017 shows residents dancing at a community culture plaza in Yumin village. This year marks the 40th anniversary of China's reform and opening-up policy.

The upper part (file) of this combo photo taken by Chen Xiaobo shows passengers passing the Luohu Port in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on April 6, 2018 shows a robot at Shenzhen Bay port. (Photos: Xinhua)

The upper part (file) of this combo photo taken by Li Changyong shows a worker producing an electronic watch at a factory in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on May 22, 2015 shows founder of Da-Jiang Innovations (DJI) Wang Tao (C) discussing with research staff in Shenzhen.

The upper part (file) of this combo photo taken by Xu Youzhu shows an office building in Shekou industrial zone in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on Feb. 24, 2015 shows a man passing a plaza in Shekou of Shenzhen.

The upper part (file) of this combo photo taken by Chi Xingxu shows a parking lot of Wenjindu passenger port in Shenzhen, south China's Guangdong Province. The lower part of the combo photo taken by Mao Siqian on June 12, 2018 shows a passenger inspection building of Wenjindu port.