Editor's note: To mark the convening of the 20th National Congress of the Communist Party of China, China Daily has selected 10 sets of photo stories that illustrate various aspects of the country's development during the past decade. The photos, posters and videos showcase the achievements and experiences of the Party's cause, and the country under Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era. This is the third in the series.

At the end of last year, seven photographers in Xiongxian county, Hebei province, took portraits of hundreds of worker couples on construction sites in Xiong'an New Area.