Machines line up during a groundbreaking ceremony for the construction of a 190-km expressway stretching from capital Phnom Penh to the deep-sea port province of Preah Sihanouk in Kampong Speu, Cambodia, March 22, 2019. China Road and Bridge Corporation (CRBC) is investing about two billion U.S. dollars for the project, which will be taken four years to be constructed, starting from March 2019 to March 2023. The expressway will have two lanes for each direction and vehicles can travel with a speed of 100 km per hour. (Xinhua/Mao Pengfei)