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"China has been the top trade partner of Africa for 10 years in a row," said Qian, pointing out that China-Africa trade has been growing steadily, reaching 4.2 billion in 2018, up 20 percent year-on-year.

"China is driving developments in battery technology. It has driven the developments in solar PV. In a whole load of ways it is getting on with things that are going to be central to the future technology of the world. They put together private entrepreneurship, a high savings rate, a state that is willing to invest in infrastructure," he explained.

"But now, things have changed. You need to climb to the top to be a winner. After five years of a quiet market, domestic as well as overseas demand is slowly pulling back this year. It poses a new challenge to XCMG."

"China is very beautiful and should be preserved for generations to come," he said. "Besides the natural environment, air, soil and water, I also hope architectural relics will be protected, including the intangible heritage, like minority culture, not just for touristy performances but as sustainable lifestyles."

"China expresses grave concern about and strong opposition to such flagrant interference in Hong Kong affairs, which are China's internal affairs," an unnamed embassy spokesperson said on Tuesday.