The sanctions aren’t effective because China is a global power. Russia is not.

You're right about China. But people don't understand that Russia is not such a poor country as they imagine. They have oil and gas exports that can be easily sold to China and other neighbors. And the sanctions, as well as military building, are helping to propel their own industry. I wouldn't be surprised if even the heavy sanctions imposed now will prove ineffective in a few years. My opinion if that Europe will suffer most with these sanctions over the long run.