This is quite unusual and different from what the US had done.
EU as a entity is calling on China, country, to negotiate against tariffs EU wants to implement against individual companies or even the industry. It sounds to me as EU is not ready to flip the switch off, so they are looking for an avenue to find middle ground, instead of being faced with some goofy SolarWorld holding cards in the multi billion dollar trade with China.
Certainly delay in the poly debacle is also a convenience for both sides if things got too advanced and strong response would be needed.
As we learned from Trina, the whole tariff in China, lost its edge which was supposedly take off the heads of tier-1 companies. The most vulnerable YGE is already having a viable solution to its "only" import suppliers in a case of the tariff, so non event for Wackers and OCIs, maybe looking more like beatings for RECs and Hemlocks. If there is one to be made an example of is the US. It would be ironic, if sum of both actions ended up as a zero sum game for both regions, and having the US spend years trying to catch up on cost advantages. However, in spite of itself, USA will receive its benefits from solar growth. I imagine that within 18 months when petitioner dies (SW) its claims will go to the grave with it. A legacy, which appears well wasted already today.