So what's the rationale behind the Chinese wish for improved...

So what's the rationale behind the Chinese wish for improved value in the market? After all, can't they simply shift the profits further down the supply chain and squeeze Western sources?
I think part of their rationale was explained by Pol yesterday:
"What is interesting is to see the modest increase in mining and production, especially production quotas in China. The other factor that is not under control at the moment, it's production of rare earths from imported ore. That quantity is substantial and doesn't help the price. But at the same time, you saw the imports from Myanmar decreasing because, at the current price level, there was no way for the mining company to find a deal that was acceptable to the separator in China."