She stressed that Washington is working hard to restore a number of military contacts.

"We are recording limited indications that they (China. - RT) show interest in this, however, again, this is a gradual process, "RIA Novosti quoted the American official as saying.

Earlier, Chinese Foreign Minister Wang Yi, during talks with Assistant to the President of the United States for National Security Jake Sullivan, said that the Taiwan issue is a red line in relations between the United States and China.