Left outside the U.S.-backed Trans-Pacific Partnership (TPP) trade pact struck last week, China and India approach this week's talks for a huge Asia-wide equivalent with fresh urgency, lest competitor nations steal a march on export access.

Beijing is a key driver of the Regional Comprehensive Economic Partnership (RCEP), a proposed 16-nation free-trade area that would be the world's biggest such bloc, encompassing 3.4 billion people.

"Member countries will be under pressure to fast-track negotiations for RCEP," said a senior official in India, which is keen to avoid being excluded from major trade accords.