Secretary for Development Michael Wong will attend the 2017 World Cities Day Forum in Guangzhou on October 31.
The event is organised by the United Nations Human Settlements Programme (UN-Habitat), the Chinese Ministry of Housing & Urban-Rural Development and the People's Government of Guangdong.
This year's theme is "Innovative Governance, Open Cities".
Mr Wong will attend the opening ceremony and give a keynote speech at the forum.
He will also attend the welcome dinner the night before.
He will return to Hong Kong on October 31.