Group 1 - The construction projects in Congo (Brazzaville) and Congo (Kinshasa) showcase the efforts of Chinese companies in enhancing local infrastructure and fostering cooperation between China and Africa [1][2][3] - The expansion of the East Terminal at the Black Point Port in Congo (Brazzaville) is being undertaken by China Road and Bridge Corporation, highlighting the challenges posed by the local geological conditions [1] - The construction of the capital ring road in Congo (Kinshasa) by China-Congo Infrastructure Construction Co., Ltd. aims to alleviate traffic congestion in the city, with a total length of approximately 72 kilometers [2][3] Group 2 - The introduction of a three-layer interchange design in the capital ring road project is a significant innovation for Congo (Kinshasa), demonstrating the transfer of advanced construction techniques from China [3] - The collaboration between Chinese engineers and local workers emphasizes knowledge transfer and skill development, fostering a sense of camaraderie and teamwork on construction sites [2] - The ongoing projects are not only improving local infrastructure but also contributing to the broader economic development and urban planning in the region [3]