[Rodrigo]

T.cf.kweichowensis is the name given to animals that look a lot like T.kweichowensis, but have some characteristics which are not consistent. When the "cf", which is an abreviation for "confer", is used in a binomial, it denotes that the animal is closest to "x" species, but the identification is not confirmed. It´s an aproximation.
In the case of this newts, you can see that T.kweichowensis has fused dorsal spots, forming two continuous lines. T.cf.kweichowensis, on the other hand, although remarkably similar, has unfused spots. the reason why this aproximation is used, is because although these newts appear frequently in the pet-trade, very little is known about them in the wild, and we don´t know if they are simply a geographical variant of kweichowensis, or a full species on its own right. Until such time as reliable data is available, it´s useful to use the T.cf.kweichowensis name for these newts to separate them from known T.kweichowensis. You can find more (and better) info about this using the search function. I have a muddy memory and tend to get things wrong with this genus.