It depends whether the operation qualifies to a taxable presense. Similar to a PE, but under local HK rules. Usually Hong Kong looks at whether the relevant person carries on a trade, profession or business in Hong Kong wherefrom profit arises and those profits can be considered as deriving from Hong Kong sources. If there is a DTTreaty between these︀ two countries, which I think there is, then you have to look there as well︁ for a PE article or similar. However whatever the applicable rules, such matters boil down︂ to the specifics of the operation and how it is conducted as a small change︃ in the operation can alter the taxabily of something.