Surprized? Not at all. The question has been open for a long time, and it seems Prof. Zhou and his colleagues found a possible answer for it.
There are two interesting aspects to this.
First, they were able to provide an answer to a previously unanswered question about the origin of magnetic fields without relying on the EU fairy tales and without rejecting the current "mainstream" model.
And second, they obviously relied on numerical simulations to design their solution. This shows how useful quantifying things and formulate them in mathematical terms is; something EU proponents always rejected because "maths are evil" or any similar sort of junk.
If even proponents of the EU theory are now posting articles that weaken their position even more...