The American Enterprise Institute published in January 2022 a report titled "China's Overseas Investment Remains Stuck in the COVID Mud" by Derek Scissors.
The study looks at China's global foreign direct investment (FDI) and construction financing from 2005 through 2021. The total for both categories in that period is $2.2 trillion. Sub-Saharan Africa accounted for $311.8 billion, most of it construction financing. The three largest Sub-Saharan Africa recipients were Nigeria ($40.8 billion), Ethiopia ($25.3 billion), and Angola ($25 billion).