In France, it is mandatory for all businesses and self-employed individuals to have both SIREN and SIRET numbers.
在法国，所有企业和个体经营者都必须拥有 SIREN 和 SIRET 号码。

The
SIREN number identifies the business entity, while the SIRET number
identifies both the business entity and its specific location or
establishment.  SIREN 号码识别企业实体，而 SIRET 号码识别企业实体及其特定位置或机构。

Introduced
in 1973, this system was created to simplify and centralize the
management of business information.该系统于 1973 年引入，旨在简化和集中管理商业信息。

SIRET
(Système d'Identification du Répertoire des Entreprises et de leurs
Etablissements) and SIREN (Système d'Identification du Répertoire des
Entreprises) numbers are used to identify businesses, but they serve
different purposes.  SIRET（企业及其机构名录识别系统）和 SIREN（企业名录识别系统）号码用于识别企业，但它们的用途不同。

• A SIREN number is a 9-digit identifier
  assigned to every registered business in France by the National
  Institute of Statistics and Economic Studies (INSEE). It is used to
  identify the business and its legal entity, such as a company or a sole
  proprietorship. SIREN 号码是由法国国家统计与经济研究所（INSEE）分配给每个注册企业的 9
  位数标识符。它用于识别企业及其法律实体，例如公司或个体经营。
  
  

• A SIRET number is a 14-digit identifier
  that includes the SIREN number and an additional five-digit number that
  represents the specific location or establishment of the business.
  Therefore, a SIRET number provides more detailed information about the
  physical location of the business in France. SIRET 号码是一个 14 位的标识符，包括
  SIREN 号码和一个额外的五位数字，代表企业的具体位置或机构。因此，SIRET 号码提供了有关企业在法国的物理位置的更详细信息。
  
  

The
SIRET number is used for a variety of administrative purposes in
France, such as tax declarations, social security registration, and
obtaining various licenses and permits. SIRET
号码在法国用于多种行政目的，例如税务申报、社会保障注册以及获取各种执照和许可证。

It is also used by the
government to compile statistics on the economy and to monitor the
activities of businesses. 政府还使用它来编制经济统计数据并监控企业活动。

As such, it is a
crucial piece of information for any business operating in France and
is typically displayed on official documents, such as invoices and
business cards. 因此，对于在法国运营的任何企业来说，它是一项关键信息，通常显示在发票和名片等官方文件上。