The 16-nation Regional Comprehensive Economic Partnership (RCEP) is poised to become the largest free trade agreement in the world, covering about half of its population.
It notably excludes the United States, which had been leading another regional trade pact -- the Trans-Pacific Partnership (TPP) -- until US President Donald Trump abruptly abandoned it in January after calling it a "job killer".
At a meeting in Hanoi on Monday, the 19th time RCEP negotiators have met, the rhetoric in favour of free trade stood in stark contrast to Trump's "America First" campaign speeches.
Apart from Beijing, the planned RCEP pact would group the 10 members of the Association of Southeast Asian Nations plus India, Japan, South Korea, Australia and New Zealand.
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The deal has gained attention since the US pullout from the TPP, which was billed as the world's biggest trade pact when it was signed in February 2016 following years of negotiations.
On Sunday in Hanoi the 11 remaining TPP nations vowed to resuscitate the deal without the US. They are eager to lock in future free trade and strengthen labour and environmental rights despite the loss of the world's number one economy.
But Beijing is now keen to use Washington's rejection of TPP to build enthusiasm for its own deal and increase influence in the region.
China is also pushing a major global infrastructure and investment drive called the One Belt, One Road initiative, which aims to revive ancient land and sea trade routes.