Wu Shicun, the president of the National Institute for South China Sea Studies, said that with Beijing and Washington locked in a rivalry on multiple fronts, the political distrust that had built up between them had led to hundreds of “track one” intergovernmental communication channels shutting down.

According to a report about US military presence in the Asia-Pacific region released by the institute on Tuesday, communication between the US and Chinese armies has been in sharp decline since 2018.

Relations deteriorated after the US withdrew its invitation for China to take part in a large-scale, multinational naval exercises, known as Rim of the Pacific, two years ago.