Just found this Tweet and some of its replies that basically confirmed the point:
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One of the noteworthy replies under the post is this:
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Honestly, Russia still thinks and behaves as if herself is still the Soviet Union (and that herself is the only one in this world that could go toe-to-toe with th United States), and still views China as some kind of a junior partner (just like how the Soviet Union under Stalin and Khruschev viewed China under Mao).
Yet, China today resembles nothing of China in the 1950s or 1960s. Although I suppose many in Russia still choose to live in the time period when they were the "Big Brotha" in Sino-Soviet/Russo relations.
Meanwhile, it is clear to everyone now that Russia wants to behave like a world nuclear superpower, but without the necessary population size, economic prowess and the industrial scale to back that behavior.
I know the anecdote mentioned in the tweet. It was during the development of CR-929. Russian delegates asked for the Chinese side to put together a technical document and the Chinese obliged, getting everything ready within a span of days and got the document neatly packaged and sealed. After the Russian delegates left, the Chinese found the documents unopened and in pristine conditions on hotel beds.