Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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.

Our self-operated model Meituan Grocery, that's Meituan Maicai, not only materially expanded its coverage in key cities such as Beijing and Shenzhen, but also began operation in such new cities as Guangzhou in July.

Answer: headquarters_location: Meituan, Beijing