Bertoli also rates Tingyi Holding Corp (a maker of instant noodles and beverages in China), Astro Malaysia Holdings (a pay-TV provider), the Hong Kong-listed Beijing Capital International Airport and Sinopec Kantons Holdings (an oil terminal and pipeline provider in China).
Refer to the input text as context and select the correct relationship between 'Sinopec' and 'Beijing' from the available options.
Options: subsidiary, currency, industry, headquarters location