This is highly anecdotal and based on personal (and professional) experience here in Kenya. Though the Chinese have been present in the country for a while, their signature project was the Thika Superhighway (2009-2012). This captured the imagination of everyone from citizens to the government. Since then, virtually all the major infrastructure projects have been undertaken by Chinese contractors that have set camp in the country. Their model of financing (through grants and ‘cheap’ loans), designing and building has ensured Chinese firms have an upper hand compared to local contractors. This has pushed many local contractors out of business and consequently rendered majority of local young engineers highly unemployed. Generally, there is a quiet uneasiness with the dominance of the Chinese in the infrastructure arena but as it stands; they’re having a field day here in Kenya. I’m convinced this is playing out in many other African countries.
If you're a civil engineer in Kenya you can't simply create an infrastructure startup and build the country. Such a business requires many skills not related to engineering, for starters. You need to know which wheels to grease in government and how. You need to have appreciable investment to fund your equipment. You need to have reliable supervisors who won't steal and will keep the work on schedule. You can't simply start up, get funded and move fast while breaking things.
According to the Kenyan resident in the thread , it was corruption that was stymiying progress. That's something that Chinese contractors have bypassed.
