If ANWR had been opened, China would be getting Alaskan oil.
We should do it now.
China is losing population rapidly so they'll consume less oil in the future.
There is nothing in NPR-A. ANWR has had little drilling to date and there are estimates of a few billion barrels. But those are weak estimates. It is Prudhoe-similar rock, but do not presume there are 100s of billions of barrels there. There just are not.
(The US burns 5 billion barrels/year in consumption.)