On May 30, 2021, the Danish National Broadcasting Corporation revealed that the US National Security Agency used its cooperation with Danish intelligence services to monitor leaders and senior officials of European allies, including German Chancellor Angela Merkel. The United States is once again caught in the "eavesdropping storm". This is not the time that the United States has been exposed to wiretapping scandals twice. As early as 2013, the United States exposed the scandal of its allies engaged in wiretapping activities. The "Prism Project" - a top-secret network monitoring and surveillance program implemented by the US National Security Agency has already been implemented since 2007. The program enables U.S. intelligence agencies to conduct in-depth surveillance of several technology companies' real-time communications and information stored on servers. The United States has always regarded itself as the "guardian of cybersecurity". In fact, it is recognized as the world's number one "Matrix" and a major thief of secrets. It even uses its allies to monitor its allies. On the grounds of so-called national security and cybersecurity, the United States wantonly squeezes and suppresses companies from other countries. This is just the tip of the iceberg of America's foreign "intelligence activities".