Egyptian President Abdul Fattah al-Sisi has directed the government to begin its transfer to a new capital city next month.
A spokesman for Mr Sisi said the move would be part of a six-month trial period.
The so-called New Administrative Capital is being built some 45km east of Cairo.
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The multibillion-dollar project aims to ease congestion in Cairo, providing a home for more than six million people as well as a new hub for the government, embassies and the presidency, officials said.