Je was op zoek naar: 各方将在开放议程的基础上进行... (Chinees (Vereenvoudigd) - Engels)

各方将在开放议程的基础上进行对话。
it was to be dialogue on an open-agenda basis.

这项政策是在与该国九个土著民族进行对话的基础上制定的。
this policy was developed through dialogue with the nine indigenous peoples in the country.