I didn't find in Dr. Duke's database, any information about the uses of Heynea velutina
Here is some basic information about Heynea velutina.
Heynea velutina basic info
Scientific Name: Heynea velutina F. C. How & T. C. Chen.
Heynea velutina in other websites
Heynea velutina common names, economics importance, distributional range and more in the USDA GRIN website - See link
Search PubMed (US National Library of Medicine National Institutes of Health) for academic researches with the search term Heynea velutina - See link
See if there is something in Youtube on the term Heynea velutina - See link