Indonesia–Malaysia–Thailand Growth Triangle
The IMT-GT is a strategic framework of international economic co-operation by the approval of leaders from the 3 countries to develop the area in the southern part of Thailand , some areas of Malaysia ( Kedah , Perlis , Perak , Penang , Selangor , Kelantan , Melaka , Negeri Sembilan ) and some areas of Indonesia ( Aceh , North Sumatera , West Sumatera , Riau , Jambi , Bengkulu , Riau Islands , Bangka Belitung , Lampung ) to become ‘the sub-region of continuous development , progress , wealth , peace and quality of life’ according to the five-year IMT-GT Roadmap ( 2007–2011 ) . 
<triplet> Indonesia <subj> Riau <obj> contains administrative territorial entity <subj> Jambi <obj> contains administrative territorial entity <subj> Riau Islands <obj> contains administrative territorial entity <subj> Bangka Belitung <obj> contains administrative territorial entity <subj> Lampung <obj> contains administrative territorial entity