A visitor looks at Chinese exhibits at the China Pavilion in Expo Milano 2015. [Photo by Tuo Yannan/China Daily]

Fabrizio Grillo, secretary-general of the Italy Pavilion, told China Daily that it was "so nice and impressive to see so many differences among all China's different regions, provinces, the historical traditions".

This year is also the first time for a China Pavilion at an expo to combine the functions of showcasing the country and promoting economic trade, Wang said.

"Between Italy and China, there are many sectors that offer the possibility of build bilateral economic relations," Grillo said.

Since 1982, the China Council for the Promotion of International Trade has organized the China Pavilion for 15 world expos.

According to Wang, the development of China pavilions in the previous expos is a process of gradual improvement. Compared to previous years, Chinese authorities have placed greater emphasis on the economic and trade aspects. This change results from the communication with other countries, "at the expo platform we not only showcase ourselves, but also learn and absorb others' advantages", Wang said.

"We learned from other experienced countries such as Italy, France, Germany and the United Kingdom. Those countries are very dedicated to the expo and to the promotion of their economic development and trade relationship through the expo. From the design and exhibitions of their pavilions, you can feel the enthusiasm of promoting trade ties," Wang said.

"Slightly, step by step, we adjust our design and concept of the pavilion to adapt to new international trends," he said.

China's provincial governments have also organized a series of higher-end economic and trade promotional activities for investors and projects through the platform.