I expect the Chinese are less exploitative in their investment approach than the Europeans that acted in Africa (slavery and just outright theft was the modus operandi for centuries), yes.
At the end of the day, the roads, high-speed rail, bridges, harbors, etc... the Chinese build can't be removed from the continent even if the individual countries do reneg on debt. This could create the kind of stable environment required to attract both Chinese and non-Chinese investors and talent in the future.
China has 10,000 years of documented history and this is a long game, they don't seem as interested in get rich quick schemes as some other civilizations.
Time will tell.