You must be thinking about AESAN countries alone, which have about $3 trillion GDP, but this free trade agreement also includes China ($13.6T), Japan ($5T) and Australia ($1.4T), placing it ahead of both USA ($20T) and EU ($15.6T)

That was my point - that China can just focus on trading with other Asian countries and be well. Especially if they someday manage to add India ($2.7T) to the mix.