ThinkPad
Lenovo's International Warranty Service (IWS) provides our customers with warranty service even if they relocate their Think Product to another country. This warranty service is available wherever Lenovo or Lenovo resellers sell and service your particular machine type. Lenovo has enhanced the IWS offering to allow customers who travel with or relocate any IWS-eligible machines to receive warranty service. Upon successful registration, you can enjoy IWS without further proof of supporting document.
Lenovo Think产品的全球联保服务(IWS)是针对携带Lenovo Think产品进行国际旅行的客户或移机至其他国家的客户所提供的全球范围的保修服务。不论您是在哪一个国家或地区购买的Lenovo Think产品，只要是符合Lenovo全球联保条件都可以在当地享受由Lenovo或Lenovo授权的服务提供商提供的专业保修服务。在全球联保注册申请被认可之后，您无需再提供其他证明就可以享受全球联保服务。
参考资料：http://www-900.ibm.com/lenovoinfo/cn/support/think/guide/iws.shtml