The Taiwan central bank said Thursday it summoned seven privately run commercial banks to remind them about mortgage-lending curbs that have been in place since June 25 after a local media report said some banks had been using their working capital to provide mortgages and had registered the loans under their corporate finance department. The central bank said after the meeting it found some banks had used their working capital to provide mortgages to managers at corporations and had registered the loans under their corporate finance department to make it appear the loans weren’t related to housing.