"Eight hundred million women, children and men still live in extreme poverty — from remote rural communities to crowded urban slums," the letter said, warning that conflicts, climate change, inequality and debt burdens were worsening the situation.

The letter called on governments to invest in decent work, education, healthcare, rural development and social protection, while urging greater financial support for developing countries.

Delegates attending the forum said the new partnership could provide a platform for knowledge sharing and practical cooperation.

Vongsey Vissoth, permanent deputy prime minister and minister in charge of the Office of the Council of Ministers of the Kingdom of Cambodia, said his country warmly welcomed the initiative as "a timely platform for solidarity, mutual learning and practical cooperation".