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Over 5,200 volunteers are university students from Shanghai and neighboring provinces. Foreign volunteers also participated in the event.

On green development, Xi said China will undertake 50 aid projects on green development, and ecological and environmental protection, with a focus on climate change, ocean, desertification prevention and control, and wildlife protection.

Following the 2008 Wenchuan earthquake, a total of nearly 2,000 children from the affected areas in Sichuan and Gansu provinces came to the Russian center for rehabilitation at the invitation of the Russian government. Another 299 children came for rehabilitation after a quake jolted Sichuan's Ya'an city in 2013.

On Wednesday morning, Xi inspected two large state-owned equipment manufacturers in Qiqihar, an old industrial base in Heilongjiang Province.

"The two sides should synergize their development strategies, fully implement the results of the 2018 Beijing Summit of the Forum on China-Africa Cooperation, bring forth innovative cooperation models, accelerate the negotiation on signing the investment protection agreement, promote collaboration in industries, trade, infrastructure and other key areas, further give play to the role of private enterprises, upgrade the mutually beneficial cooperation between the two sides and bring benefits to both peoples," Li said.