Nukes cost money to make and maintain. A lot of money.
So how many nukes would be enough in your opinion? Both the US and Russia have enough nuclear weapons to wipe out the planent many times over. Why does China need to match those numbers?
Furthermore, despite its massive nuclear arsenal, Russia is currently under crippling sanctions. It's economic lifeline, oil, can be wrecked at will by the US. Its overseas interests are under siege, and it has been forced to expend lives and material just to keep their assets from getting wiped out.
Compare this to China, who is expanding its control over the SCS, and the only thing the Americans can do is sail ship in international waters.
that's because Russia can't even make shoes and clothes, and grow food. The simple stuffs.
learn what's Russia's strength n avoid its weakness to boost oneself.