Still though, China is the only country that can negate the effects of western sanctions on Russia to a major extent, at least individually, and normally it has low ideological baggage when China helps somebody out with funds.
I hope they leverage this to get some ToT from the russkies before they get into an actual conflict with the US.
Bdw, how would you define the $2bn deal for 24 su35 in terms of cost?.
Western sanctions are not working with Russia, as they, especially Germany, are still buying oil and natural gas from Russia. And Japan is also becoming a large customer of Russian gas and oil, and will be a bigger customer once those trans-siberian pipelines are finished. It can be said that China's and Russia's economic ties will deepen thanks to the trade wars.
The main difference between China's and Russia's current ideology is that oligarchs don't survive long in China. They can find themselves charged with corruption and go to jail.
$2 billion for 24 Su-35 is not a big deal for China. Its small potatoes, chump change they can afford, but it gives a big political boost to improve their friendship with Russia. China is under fire from the Russians for copying IP to duplicate the Su-27, but which China claims they have a license. This IP issue not going anywhere, the Su-35 buy will help placate those differences. Another factor is that this purchase helps China's influence on the Russian Far East, since these Su-35s are built on a plant north of Chinese border near Harbin. Once finished, these Su-35s don't need to travel far to get to their Chinese bases and if they need some maintenance, its all next door. Flankers and Kilo subs destined to China are mostly made in this Amur region; the Kilo successor that the Chinese Navy considered buying, the Lada-Amur class, not surprisingly is also made here.
To China's credit vis a sis the relations with Russia, vs. India's relations with Russia, China conducts more major joint exercises with Russia. You can see last year when the Chinese Navy was the only foreign navy that joined Russia's naval parade. (This year was all Russian though). This year, later this month, the PLA will send a large army contingent to participate in Russia's massive Vostok exercise. Previously, there was another major Russian exercise where the PLAAF sent a contingent of planes to participate. Also the Russian Pacific Fleet is on the move, for a major exercise, and its a common habit for the PLAN to have joint exercises with them.