请大家帮我看看我这个签证clear的邮件是什么意思？

Dear Applicant,

We are pleased to inform you that the processing of your visa application is now complete. Your visa will be forwarded to the Chinese Ministry of Foreign Affairs, usually within 3-5 business days. Please contact the Chinese Ministry of Foreign Affairs via your local foreign affairs office to collect your passport.

Thank you,

Visa Section

U.S. Embassy Beijing

签证不是直接通过中国邮政返还吗？为什么要转到中国外交部？我怎么通过当地外事部门联系中国外交部取我的护照啊？大家有和我类似的经历吗？