Nobel Prize-winning economist explains why. Here is part of his article in The New York Times:
The West has, however, largely cut off Russia’s access to the world banking system, which is a very big deal. Russian exporters may be able to get their stuff out of the country, but it’s now hard for them to get paid. Probably even more important, it’s hard for Russia to pay for imports — sorry, but you can’t carry out modern international trade with briefcases full of $100 bills. In fact, even Russian trade that remains legally permitted seems to be drying up as Western companies that fear further restrictions and a political backlash engage in “self-sanctioning.”
How much does this matter? The Russian elite can live without Prada handbags, but Western pharmaceuticals are another matter. In any case, consumer goods are only about a third of Russia’s imports. The rest are capital goods, intermediate goods — that is, components used in the production of other goods — and raw materials. These are things Russia needs to keep its economy running, and their absence may cause important sectors to grind to a halt. There are already suggestions, for example, that the cutoff of spare parts and servicing may quickly cripple Russia’s domestic aviation, a big problem in such a huge country.
But can China provide Putin with an economic lifeline? I’d say no, for four reasons.
First, China, despite being an economic powerhouse, isn’t in a position to supply some things Russia needs, like spare parts for Western-made airplanes and high-end semiconductor chips
Second, while China itself isn’t joining in the sanctions, it is deeply integrated into the world economy. This means that Chinese banks and other businesses, like Western corporations, may engage in self-sanctioning — that is, they’ll be reluctant to deal with Russia for fear of a backlash from consumers and regulators in more important markets.
Third, China and Russia are very far apart geographically. Yes, they share a border. But most of Russia’s economy is west of the Urals, while most of China’s is near its east coast. Beijing is 3,500 miles from Moscow, and the only practical way to move stuff across that vast expanse is via a handful of train lines that are already overstressed
Finally, a point I don’t think gets enough emphasis is the extreme difference in economic power between Russia and China.
Some politicians are warning about a possible “arc of autocracy” reminiscent of the World War II Axis — and given the atrocities underway, that’s not an outlandish comparison. But the partners in any such arc would be wildly unequal.
Putin may dream of restoring Soviet-era greatness, but China’s economy, which was roughly the same size as Russia’s 30 years ago, is now 10 times as large. For comparison, Germany’s gross domestic product was only two and a half times Italy’s when the original Axis was formed.
So if you try to imagine the creation of some neofascist alliance — and again, that no longer sounds like extreme language — it would be one in which Russia would be very much the junior partner, indeed very nearly a Chinese client state. Presumably that’s not what Putin, with his imperial dreams, has in mind.
China, then, can’t insulate Russia from the consequences of the Ukraine invasion. It’s true that the economic squeeze on Russia would be even tighter if China joined the democratic world in punishing aggression. But that squeeze is looking very severe even without Chinese participation. Russia is going to pay a very high price, in money as well as blood, for Putin’s megalomania.