It's a start
Nothing too ground-breaking there, but the fact that they have created a self-contained biosphere (albeit a small one) is a clear indication of China's future plans for the moon. It may already have been done on the ISS, but then I don't think anyone has intentions of setting up a colony there.
One point - unless I missed something the soil used was brought from Earth. It would be interesting to see how far they get with Moon soil (I'm sure it's not just a case of 'Add water...').