Photo taken on April 9, 2020 shows the Dar es Salaam Port undergoing upgrading of port berths 1 to 7 in Dar es Salaam, Tanzania. The upgrading work, undertaken by China Harbor Engineering Company, is expected to be completed by 2020. (Xinhua)

Photo taken on April 9, 2020 shows the Dar es Salaam Port undergoing upgrading of port berths 1 to 7 in Dar es Salaam, Tanzania. The upgrading work, undertaken by China Harbor Engineering Company, is expected to be completed by 2020. (Xinhua)

Photo taken on May 4, 2020 shows the Dar es Salaam Port undergoing upgrading of port berths 1 to 7 in Dar es Salaam, Tanzania. The upgrading work, undertaken by China Harbor Engineering Company, is expected to be completed by 2020. (Xinhua)

Photo taken on May 14, 2020 shows the Ubungo interchange under construction in Dar es Salaam, Tanzania. The Ubungo interchange, mainly consisting of a 17.5-meter three level interchange and service roads, is the biggest project of its kind in the country being constructed by China Civil Engineering Construction Corporation (CCECC). It is expected to greatly reduce traffic congestion at the busy Ubungo junction with more than 60,000 vehicles passing daily upon completion in December. (Xinhua)

Photo taken on May 2, 2020 shows the Ubungo interchange under construction in Dar es Salaam, Tanzania. The Ubungo interchange, mainly consisting of a 17.5-meter three level interchange and service roads, is the biggest project of its kind in the country being constructed by China Civil Engineering Construction Corporation (CCECC). It is expected to greatly reduce traffic congestion at the busy Ubungo junction with more than 60,000 vehicles passing daily upon completion in December. (Xinhua)

Photo taken on May 17, 2020 shows the Ubungo interchange under construction in Dar es Salaam, Tanzania. The Ubungo interchange, mainly consisting of a 17.5-meter three level interchange and service roads, is the biggest project of its kind in the country being constructed by China Civil Engineering Construction Corporation (CCECC). It is expected to greatly reduce traffic congestion at the busy Ubungo junction with more than 60,000 vehicles passing daily upon completion in December. (Xinhua)

Photo taken on May 2, 2020 shows the Ubungo interchange under construction in Dar es Salaam, Tanzania. The Ubungo interchange, mainly consisting of a 17.5-meter three level interchange and service roads, is the biggest project of its kind in the country being constructed by China Civil Engineering Construction Corporation (CCECC). It is expected to greatly reduce traffic congestion at the busy Ubungo junction with more than 60,000 vehicles passing daily upon completion in December. (Xinhua)