Utilize the input text as a context reference, choose the right relationship between 'Vanke' and 'Hong Kong Stock Exchange' from the options.
Options: owner of, position held, stock exchange, industry

China Vanke Co Ltd , the country's largest developer, said in a statement to the Hong Kong Stock Exchange on Monday it planned to repurchase up to 10 billion yuan ($1.6 billion) worth of its domestic shares to protect investor interests.
stock exchange