Besides showcasing a wide variety of plants, the more important meaning of the exhibition is that gardens can reflect a close relationship between the local ecological environment and the lives of local people, said Takuhiro Yamada, a horticultural expert from Japan.

"For those of us in the horticultural industry, how to maintain a climate more suitable for human survival is an important issue that we have been studying. We hope that through these exhibition gardens, everyone can rekindle their awareness of the environment and climate, highlighting the importance of protecting the ecology and climate," he said.

"With Chengdu being a park city, the park created for the expo will enable the city to establish itself as an example to the world of how to create green city ecology, and how to develop ecologically in a way that will create an attractive livable environment for citizens," said Briercliffe from AIPH.