一般情况下，应按照有关驻华使领馆和文书使用国的要求办理单认证或双认证。有关驻华使馆办理领事认证的具体要求请参见中国领事服务网（网址：http://cs.mfa.gov.cn/）相关栏目或向外交部领事司咨询。

In general, single or double authentication should be processed according to the requirements of the relevant embassy or consulate and the country of document usage. For specific requirements on consular authentication by the Chinese embassy, please refer to the relevant section on the Consular Service website of China (website: http://cs.mfa.gov.cn/) or consult the Consular Affairs Department of the Ministry of Foreign Affairs.