NEW DELHI: In a major crackdown on the so-called Chinese loan app racket, the police raided a three-storey building in Dwarka's Sector 7 and arrested four suspects, including the kingpin, who were recovering money on behalf of their Chinese handlers. The racket was being run in the garb of a BPO and consulting firm called Fly High Global Services with 134 women and 15 men as employees. The firm had purchased 300 SIM cards in the name of another company and used 100 of these to threaten people to pay up many times the amount they had availed from the…