You’ve read about the CIA, FSB and MI6, maybe even the French DGSE, but what about China’s own Guojia Anquan Bu (Guoanbu) with 100,000 agents worldwide? — I first read about the Guoanbu way back in 2009 when I was researching my first novel ‘Gate of Tears’. My interest had been piqued by China’s involvement in Yemen, a country bordering ‘Bab el Mandeb’ (Gate of Tears), the strategic strait at the mouth of the Red Sea.