This name is a synonym of Pyracantha fortuneana (Maxim.) H.L.Li.
The record derives from RJP
(data supplied on 2011-10-18)
which reports it as a synonym (record 7204) with original publication details: The Gardener's chronicle The Gardener's chronicle; 1887 325 1921.
This name record (from RJP) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Pyracantha yunnanensis in version 1 of The Plant List.