The U.S. Center for Naval Analysis published in June 2016 a 186 page report titled "China's Response to Terrorism" by Murray Scot Tanner and James Bellacqua.
While there are only about a dozen references to Africa, this is an excellent compilation of the terrorist threat faced by China and its response both domestically and internationally. It contains the following chapters:
--An Overview of China and Terrorism
--Beijing's Perceptions of an Evolving Terrorist Threat
--China's Policies toward Counterterrorism
--China's Counterterrorism Bureaucracy
--U.S.-China Counterterrorism Cooperation