Hong Kong Herb Looks Like Fenugreek

I live in Hong Kong and I bought this herb at a village shop. I don't speak Cantonese and they don't speak English (or at least it doesn't cover the English for this herb). Could you please identify it for me? I guess it is for eating and is not a cure for dandruff or impotence.

It is impossible to make a definite identification based on the image you sent, but it could be fenugreek (Trigonella foenum-graecum).
Here are some images of the fenugreek plant that may help you to decide if that's what you have:
https://pharm1.pharmazie.uni-greifswald.de/allgemei/koehler/koeh-273.jpg
https://www.dpi.vic.gov.au/CA25677D007DC87D/LUbyDesc/Fenugreek+flower.jpg/$File/Fenugreek+flower.jpg
https://www.feenkraut.de/herbpictures/bockshornklee1.jpg