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"Chinese are sensitive to exchange rates," Becker said.

"Chinese and African people share a common wish to enjoy a beautiful environment and prosperous life. The environmental sector is a key cooperation field for China and Africa," said Huang Runqiu, minister of ecology and environment, at a launch ceremony for the center in Beijing.

"China strongly urges the relevant country to take a highly responsible attitude, exercise restraint and earnestly preserve the existing arms control regime in an effort to safeguard global strategic balance and stability, and international and regional peace and security," the envoy said. "This is the shared message from the international community."

"Cross-country ski is our national sport; we were born with skis on our feet," he said. "Already China has learned a lot, and the progress is better than I expected at the beginning.

"China should keep deepening reforms and focus on transforming government functions to further bring out market vitality," Li said.