Utilize the input text as a context reference, choose the right relationship between Baidu and Internet 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.

The primary app stores of Internet giants Qihoo, Tencent and Baidu account for two thirds of the market.

Answer: industry