But wouldn’t china be motivated and have the means to build all of that pipeline very quickly?

Seriously. This is China. No need for environmental impact studies. They built 2 hospitals in a matter of days. They can probably lay down a few tens of thousands of miles of pipe in a week.

They've been building hundreds of thousands of kms of road per year. Although I don't know what the real numbers are.

https://www.globaltimes.cn/content/1189387.shtml

Chinese might.

Russians? IDK. It won't be their war. And the oil wells of Russia are rather far from China border, in pretty inhospitable Siberia.

They would just get the oil by trucks.

Sure it is more expensive than getting it by oil tankers. But possible. And it would be cheaper than the US cost of doing a naval embargo.

There is nowhere near enought trucks in existance for that.

Is that really correct?

China imports according to google 7,620,760 barrels of oil a day.

A similar lookup gives that the largest tanker trucks can carry 176 barrels of oil.

So that would, if all capacity was by truck (I know it will not be) over 43000 truck loads pr day over very bad road conditions.

Russian oil is quite a ways West, around Kazakhstan, and China's population density is to the East. The trip would be around 5000km, and take a week on good roads. Perhaps double or triple this depending on the season, and maybe with a "Russia" multiplier.

So multiply that 43,000 by 14 to 42, or more, and you're within a factor of ten of all (~16M according to Google) commercial trucks in the world, of which only some fraction are tanker trucks.

Interesting. But how is all that oil currently distributed within Russia and China?