I wonder if this'll lead to any sort of action against China. Generally people have thought that China wouldn't outright support Russia with war materials because they can't afford to be sanctioned by "the West", as they're much more reliant on trade with the EU and US

Western media (good) says China bad and refuses to provide evidence. More at 11.

Would those unspecified metals be of good quality or is there a risk they might be the sub-par stuff that is said to be exported by unscrupulous Chinese companies?