Xu Shouzhi and his 12 colleagues are typical of many groups of Chinese workers operating across Africa today.
Chinese-built structure that saved lives opens doors in Congo.
From a futuristic airport to an athletes' village, Chinese firm's hard work is easy to spot.
This year is the 50th anniversary of the establishment of diplomatic relations between China and the Republic of Congo. Over that time the relationship has matured like a well-cared-for plant, and in the past few years there has been a new spurt of growth.
Since 2010, many African countries have been marking their 50th anniversaries of independence from colonial rule.
Xu Fei's four-wheel drive splutters in low gear, straining to make headway on what passes for a road in Lusaka, Zambia.
Guan Tingzhong believes the secret of business success in Africa is making friends first.
Relations between China and Zambia are growing in leaps and bounds, just as the friendship between China and Africa is flourishing. China's growing involvement in the continent has sparked reactions in many parts of the world that can only be described as perplexing.
Zambia was the first developing country in southern Africa to establish diplomatic relations with China. Over the years, these good relations have included increasing economic and trade ties. The country's pillar industry, mining, has become the world's fourth-largest copper exporter and the second-largest cobalt exporter.
A bottle of water stands on the desk in an office in the Ethiopian capital, Addis Ababa. The water is so clear that it is barely imaginable that a short while ago it was running through a river into which flows all the waste water from a local tannery.
China remained the leading investor and proponent of renewable energy in 2013, even as global investment fell sharply, according to a report.
The UN's most senior environmental official says China's efforts at tackling its own industrial cleanup have passed "a turning point", and thinks the transfer of that know-how to Africa will now be vital to the continent's future sustainable growth.