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"Despite there being no data on African emission levels, it is estimated that transport accounts for more than a fifth of greenhouse gas emissions and is responsible for a large share of urban air pollution," he added.

"Discount offers are necessary to expand Alibaba's cloud market share ... It also needs further spending to fill out its original content offerings," Ella Ji, an analyst at China Renaissance Securities US Inc, wrote in a research note in April.

"Exports to China are very limited compared with the imports ... China is a large country with a very large population and the exhibition is an opportunity to increase our exports to China," she said.

"E-commerce is no longer a monolithic shopping channel, after years of blockbuster development in China," said Qi Zhe, an analyst at China International E-commerce Center.

"Etiquettes of ancient China, for example, are still relevant in modern society," he says.