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Zhou Yongsheng, professor at China Foreign Affairs University, said China-Africa cooperation had shown signs of upgrading, as the two sides were increasingly supplementary to each other.

Exercises based on defense and settlement of emergencies were also conducted to test the command system's response and soldiers' combat skills.

BEIJING, Feb. 17 (Xinhua) -- President Xi Jinping on Monday said the ruling Communist Party of China (CPC) and the government must constantly improve the level of governance and promote socialism with Chinese characteristics.

Putin declared the Games open at the Fisht Olympic Stadium following a speech by Olympic chief Thomas Bach, who stressed "the Olympics are about building bridges to bring people together."

"A governing system is determined by history, cultural tradition, economic development, and the will of the people," he said.