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Among the workers is Yang Yang, a gauger in his 20s who has been working on the project since 2013.

Ammonia, composed of hydrogen and nitrogen, is already produced en masse from fossil fuels and exported worldwide to make fertilizer. It maintains a liquid state at around minus 33 C, meaning it is much simpler and cheaper to transport than liquid hydrogen at minus 253 C.

Among the exhibits were photos of Africa's flagship projects in science and technology, science and technology achievements of South Africa and China and their cooperation results.

Amazon’s top 100 list ranks the most popular electronics?based on sales, and is updated hourly, so the list?can fluctuate. For instance, Amazon’s phone ranked in the?49th spot earlier this morning.

Amazon’s rise to the top of the tech world is remarkable. A company that started out selling books online from Jeff Bezos’ garage has turned into a behemoth now valued at nearly 0 billion, with shares up 50 percent in the past year alone. Bezos meanwhile just had?his?net worth reach 0 billion for the first time.