The US has during the last couple of years blocked Chinese technology firms from entering their market. One of the targets has been Huawei, one of the world's leaders in communication equipment. According to Michael Rogers, chairman of the House Permanent Select Committee on Intelligence, “Huawei and ZTE provide a wealth of opportunities for Chinese intelligence agencies to insert malicious hardware or software implants into critical telecommunications components and systems”. The reason, it becomes clear now, is that this is what NSA makes US companies do. This validates the old saying: Thieves believe everybody else steals.