Utilize the input text as a context reference, choose the right relationship between Vanke and Hong Kong Stock Exchange 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.

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.

Answer: stock_exchange