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Xi, also general secretary of the Communist Party of China (CPC) Central Committee and chairman of the Central Military Commission, visited a major exhibition to commemorate the 40th anniversary of China's reform and opening-up at the National Museum of China.

The expo was planned, proposed, designed and promoted by Xi.

Faced with complicated and ever changing international situation, Germany and China should carry out closer communication and coordination, Merkel said, adding that her country supports Europe and China to strengthen cooperation and is willing to play a greater role in this respect.

On trade issue, the Chinese president said that G20 should firstly stick to openness and free trade, maintain and further expand an open market, and realize win-win cooperation through mutual exchanges and complementarity.

Economists and entrepreneurs shared their viewpoints on economic situation and policy, the private sector, technological innovation and job markets at the seminar.