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It pledged to fully implement the reform measures within one year and bring material improvements to the conduct and ethics of the science community in three years.

Geng said since China resumed the exercise of sovereignty over Hong Kong, the principles of "one country, two systems" and "Hong Kong people governing Hong Kong" with a high degree of autonomy have been earnestly carried out. The entitled rights and freedom of Hong Kong residents have been fully guaranteed according to law.

China's cooperation with Africa is sincere and selfless, and has no geopolitical purposes, said Wang, adding that China had always followed the principle of non-interference, provided aid as Africa needed, carried out South-South cooperation, and helped achieve common development.

Noting uncertainties and challenges from the external environment as well as the arduous tasks at home, he stressed the importance of maintaining sustained and sound economic growth and social stability.

Based on the achievements made as of now, plenty of work should be done to realize "chemical reactions," Xi stressed.