Top: File photo taken in 1988 by Liu Shilin shows babysitter Yang Zhongying (L) taking care of a baby in southwest China's Chongqing. Bottom: Photo taken on July 3, 2019 by Liu Junxi shows maternity matron Chen Yurong (R) and nurse He Xiuli taking care of a baby in Hefei, east China's Anhui Province. In the 1980s, with the development of city life, some families needed helpers to look after the elderly or children and do housework. Nowadays, household services have gradually become a common demand of urban residents. From nannies to professional babysitters and child nutritionists, household services are more specialized. 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)