Scenarios: How could China hit back at U.S.?

Beijing has not said how it may retaliate. Here are some of the steps it could take.
MILITARY TIES
The most likely and immediate consequence will be that China again freezes military ties with the United States, which had been thawing since 2009, as the Obama administration sought to expand contacts between the Pentagon and the People's Liberation Army.
Those contacts, especially any high-level military visits, are likely to be on hold for months to come.