China is going to look after their own interests first. They are taking advantage of Russia’s weakness. Anyone who thinks Russia is strong had better take another look. Just compare Russia’s GDP to China’s. China is not interested in subsidizing Russia.
China has almost 10 times as many people as Russia.
GDP per capita is a more interesting statistic.
In that, Russia has a commanding lead:
$15,000 to $7,000.
Also, Russia has thousands of nuclear weapons and ICBMs.
No rational person is going to get into a shoving match with a former KGB colonel.