Utilize the input text as a context reference, choose the right relationship between SmarTone and Hong Kong from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Among Hong Kong stocks, SmarTone Telecommunications Holdings is attractively priced, share valuation service Skaffold says.

Answer: headquarters_location