No,
I could be completely wrong but I believe that there is no need for specific male trees.
For example, you don’t need a female and male Dongkui to get fruit. You just need a female, or hermaphrodite, and a male that produces pollen around the same time.
I’ve done a lot of searching and have not heard about specific male Dongkui, male Biqi, male an Hai and male crystal trees. I personally believe it is a marketing gimmick. Nothing I have found online talks about these specific male trees.
I am very interested in the time of year everyone’s male trees bloom and I would love to collect the data from everyone that purchased Specific male trees so please post your variety name and when it blooms once your trees are mature enough.
My understanding is that the Yangmei season is relatively short and most varieties bloom at approximately the same time. Sure, some will bloom a little earlier or later but I assume just about any male and female combination will give you fruit once your trees are mature enough.
I assume varieties with larger fruit like Dongkui will ripen slightly later and smaller varieties like Biqi May ripen slightly earlier but this is just my guess.
Simon