"China is ready to work with the international community to realize the 2030 Agenda for Sustainable Development and build a clean, beautiful world," Xi said in his letter.

This year's conference gathered more than 2,400 participants, including international guests from over 30 countries and regions and involving almost all the top international organizations specialized in environment protection and green development.

The three-day conference includes seven summits, 10 themed forums, five international workshops and international consul--tation sessions, as well as some featured activities. Besides inviting international stake-holders, the eco forum has made international exchange and cooperation key parts of its agenda.

The Sino-Swiss Dialogue, held annually since 2014, brought together guests from both countries for in-depth conversations in fields like technological in-novation.

"For a long time, Switzerland has paid attention to the relationship between development and environment, and found a successful path of green development for an inland mountainous country like itself. Guizhou should learn from its experience," said Lu Yongzheng, vice-governor of Guizhou.

Lu said the dialogue is meaningful not only in exchanging experiences and concepts, but in offering an opportunity to strengthen mutual cooperation between them.