Top: File photo taken in 1962 by Hu Wei shows breeder Wang Decheng feeding a four-day-old calf at Xinghuo cattle farm in northeast China's Heilongjiang Province. Bottom: Photo taken on July 10, 2019 by Wang Jianwei shows Zhang Deyu working at a cowshed in a forest farm in Heilongjiang. 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)