In a statement the exchange said it made the decision quote: "In light of further consultation with relevant regulatory authorities."

It is a U-turn from last week, when the NYSE said it would delist the three.

In November, the U.S. government moved to block American investors from 31 firms it says are owned or controlled by the Chinese military.

China Unicom and China Telecom said in statements that they had taken note of the development and would release information in accordance with regulations, adding that investors should pay attention to investment risks.

China Mobile was not immediately available for comment.

China's foreign ministry had called the planned delisting, "unwise" and that it reflected how quote "random, arbitrary and uncertain" U.S. rules can be.

On Tuesday after news broke of the reversal shares of all three companies surged in Hong Kong trade.