Top: File photo taken in 1987 and provided by China Railway Nanning Group Co., Ltd. shows the cab of a diesel locomotive in south China's Guangxi Zhuang Autonomous Region. Bottom: Photo taken on June 26, 2018 by Lu Boan shows a railway worker driving a bullet train in Nanning of Guangxi. In the past, train drivers had to call the station to confirm the inbound track and signals, and watch out for signal light on their own. Nowadays, these tasks have been replaced by automatic signal acquisition system. The mechanized control in the train cab has been replaced by digital control, and the working environment of the driver has been greatly improved. In 1949 when the People's Republic of China was founded, the Chinese people faced a devastated country that needed to be rebuilt from scratch after decades of warfare and chaos. After decades of unremitting endeavors and dedication by the Chinese people, China has grown to be the world's second largest economy. In 1952, China's GDP was 30 billion U.S. dollars, while in 2018, its GDP reached 13.61 trillion U.S. dollars, an increase of 452.6 times. A group of combo photos give you a glimpse of what Chinese people did decades ago and what they do right now. Undoubtedly, people from all walks of life in China with hard work and wisdom have made contributions to the country's development. (Xinhua)