Zhao Shiwei, chief engineer of the institute, said the types and quality of flowers in China have been raised in recent years, which has helped the country gain more global influence in the sector.

"The expo will drive China's consumption of flowers and promote horticultural communication between it and foreign countries," he said. "It is also a good chance to advocate conservation of resources, ecological protection and sustainable development."

To ensure diversity of species, the authorities designed a wetland in which birds can rest, which has attracted more kinds of birds and insects. They also tried their best to avoid damage to existing plants and other natural resources during infrastructure construction.

For instance, the China pavilion uses drip irrigation, rain water collection and solar power to illustrate recycling.

Each of the pavilions shows a different culture to visitors through plants and construction design. Visitors will learn about different countries' cultures and traditions.

According to the head of a Japanese exhibition park, all the wood and decorations on display were delivered from Japan, which will help demonstrate the green life concept of the country.

According to the authorities, the expo will include flowers, fruits, vegetables, herbs and teas. Visitors will be able to have "close touch" with flowers from all over the world.