Utilize the input text as a context reference, choose the right relationship between 'Sinopec' and 'Beijing' from the options.
Options: creator, business division, headquarters location, original broadcaster

SHANGHAI Aug 21 Safety hazards have been found at almost 70 percent of firms handling dangerous chemicals inspected in Beijing since two massive blasts killed 114 people last week, including a branch of Asia's largest refiner Sinopec Corp, state media reported.
headquarters location