Each service Version may have a consumer identifier that is used when the service is acting as a client on other services.

每个服务版本可能都有一个消费者标识符，该标识符在服务充当其他服务上的客户端时使用。

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Social media (in China, BBSes, QQ, Sina Weibo and other mobile texting services) provide reinforcement, acting as word-of-mouth before the final purchase decision is made, which may be made online or offline.

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Accountants would be restricted in the provision of other services, such as consultancy, to firms for which they are acting as auditors.

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