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"Cameroon is a sovereign country ... It is no other person's business. We do exactly what we have to do to develop our country," Ngute told Xinhua while visiting the construction site of a China-funded water plant.

"China contributed to about 50 percent of the brand's sales revenue in Asia, and in the past five years, our compound growth rate in China has been higher than 5 percent," according to the branding department of Haagen-Dazs China.

"But the proposal does not mean that no other bands will be used for 5G. High-frequency bands will be used later to boost the internet speed," Xiang said.

"China has gained new momentum in the commercialization of methanol vehicles and already leads the world in both scale and technology," said Wei Anli, secretary-general of the group responsible for the country's methanol vehicle trial work under the Ministry of Industry and Information Technology.

"China is ready to work with countries where projects are based to prevent environmental problems through effective measures," he said.