The consular bag may contain only official correspondence and documents or articles intended for official use and must be sealed and bear visible external marks of its character.

领事邮袋以装载来往公文、公务文件及公务用品为限，应予加封并附有可资识别的外部标记。

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Indeed, Bidwell found that not only do external hires get paid more, but for their first two years on the job, they receive significantly lower marks in performance reviews.

FORBES: Why Promoting From Within Usually Beats Hiring From Outside