Tax ID, or if your contractor doesn't have one, social security number.
税务身份证，或者如果您承包商没有一个社会安全号码。
The next time a contractor asks to run his own security, what should I say?
下次承包商要求使用他们自己的安保系统我应该说什么？
The next time a contractor asks to run his own security, what should I say?
下次承包商要求使用他们自己的安保系统我应该说什么？
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