The problem with Shenzhen is that it’s in Chinas tropical belt, so I’d say chances of drawing from a clueless crowd of every day Chinese citizens might be just as, if not more challenging than in the other 10 places they have tried to pitch their tent without success.
On the other hand, Shenzhen is the border to Hong Kong, so maybe they are speculating on drawing expats from there. (Though given the political climate in HK i wouldn’t assume that all too many people are running at the chance to make the trip to China just cause of a gimmicky hockey team)