中华人民共和国劳动合同法 第七条

用人单位自用工之日起即与劳动者建立劳动关系。用人单位应当建立职工名册备查。

Labor Contract Law of the People’s Republic of China, Article 7

A labor relationship is established by an employing unit with a worker as of the date the former employs the latter. An employing unit shall keep a register of workers for reference.