This chapter discusses regional cooperation and architecture issues important for supporting the rebalancing of growth in Asia toward domestic and regional demand. The main topics covered in this chapter are: (i) the provision of foreign exchange liquidity; (ii) implementation of a regional FTA; (iii) cooperation to develop and finance infrastructure investment; (iv) regional monetary and financial institution-building to support regional surveillance, financial cooperation, and integration; and (v) cooperation on exchange rates to help address global imbalances and support the longer-term economic and financial integration of the region. The chapter also argues that Asian economies should play a much bigger role in the global financial architecture, especially the G20.