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More than 3,500 Chinese companies and over 450 overseas companies are taking part in the four-day event.

Xi stressed that over the past 40 years of reform and opening up, China's rapid development has also benefited from the improvement of education. China is committed to advancing the modernization of education and making its education system satisfying for its people.

A parade featuring festooned vehicles was held in the morning as the park welcomed the first group of visitors. A giant panda made of flowers rode through the 503-hectare park as performers in colorful costumes walked by.

By the end of last year, China had signed 170 inter-governmental cooperation documents with 122 nations and 29 international organizations.

BEIJING, April 27 (Xinhua) -- Chinese leadership has tirelessly reaffirmed its commitment to opening up. It is the solemn promise made by the world's second-largest economy to the rest of the world.