David Pegg, a Guardian investigations correspondent, delves into the controversial Yang Tengbo case, revealing deep ties between Prince Andrew and the accused Chinese spy. Dan Sabbagh, the Guardian's defence and security editor, highlights the drastic changes in China's espionage tactics, blending traditional hacking with personal influence. The discussion also uncovers alarming cybersecurity threats facing the UK, including a significant breach at the Ministry of Defence, raising urgent questions about national security and international diplomacy.