By baona / Getty Images Once carefree and comfortable, Huang is now haunted by debt — the target of a scheme operated by international crime groups that force human trafficking victims to do online scamming work. Once carefree and comfortable, Huang is now haunted by debt — the target of a scheme operated by international crime groups that force human trafficking victims to do online scamming work. She is among a growing number of Chinese people lured into handing over large sums of cash by scammers posing as potential love interests. Known as “pig butchering”, the schemes are operated by cr…