Not any deep involvement that I have heard of. Articles from 2016 report a technical cooperation agreement between the two, not financial. T-King might be useful to BJEV (BluePark) as a "sidekick" for small technical jobs or as a supplier of certain items. T-King makes electric logistics vehicles, so could use some of BluePark's technology. After all, BluePark now has more "glamorous" friends like Magna to hang out with!
P.S.: If and when T-King comes out with the NEV version of the Wangzi, we may find out how closely it is related to the EC cars (with respect to motors, batteries, performance indicators, connectivity/safety features, etc.).