If your ancestor immigrated to the United States there is very likely an immigration file for him in the U.S. National Archives. These files have information about family history and photos.
Alternately what information do you have about him? He is from Hoiping/Kaiping -- do you know of the village name? Do you have his name in characters?
There are a lot of Cantonese Ho's so it's a matter of getting to the village or town level specifically.