This has to be regarded as a play on the US dollar. Most likely, China wants to dump its dollars for tangible goods. In this likely case, Ukrainians are the dupes, unless they quickly pass the dollars along for other goods.
This action also illustrated the stupidity of the dialogue against land ownership. One of the arguments occasionally made against allowing Ukrainians to sell their land is that they’d give control of it to foreigners. Well, guess what. The same thing happens when the government owns land, only in this latter case, regular people don’t get any money whatsoever.