A bird's-eye view of the Chongqing city on May 6, 2020. (Photo: Xinhua) The Chengdu-Chongqing regional economic zone whose construction began in January 2020 recorded major breakthroughs in mechanism innovation, infrastructure construction connection, and cooperation in economy and people's livelihood during the past year, said a Xinhua report. The dual city economic circle, as the fourth pillar region following the Yangtze River Delta region, the Guangdong-Hong Kong-Macao Greater Bay Area and the Beijing-Tianjin-Hebei region, will accelerate its high-quality development in the coming year.

This photo taken by drone shows the Guoyuan harbor in Chongqing, on June 9, 2020. (Photo: Xinhua)

A view of Chongqing city on May 10, 2020. (Photo: Xinhua)

A bird's-eye view of the Chengdu Tianfu International Airport on Dec 19, 2020. (Photo: Xinhua)

A light show lights up Chengdu, Sichuan province, on Dec 31, 2020. (Photo: Xinhua)

The Chengdu-Ziyang-Chongqing expressway, the fourth expressway of the Chengdu-Chongqing city cluster, starts operation on Dec 31, 2020. Photo taken on Dec 30. (Photo: Xinhua)

A man tries a concept car at an exhibition hall located in the Sichuan-Chongqing Gaozhu New Economic Zone on Dec 16, 2020. (Photo: Xinhua)

A China-Europe freight train departs from Chongqing on Jan 1, 2021. (Photo: Xinhua)