China banks' Hong Kong arms try to rally staff support for security lawAs Beijing moved ahead with a national security law for Hong Kong, some of the hundreds of thousands of professionals working at the local units of Chinese financial firms could find themselves stuck in the cross hairs. Staff at BOC Hong Kong, the local arm of Bank of China, CEB International, a unit of China Everbright Bank, and a local unit of China Construction Bank said they had been asked by managers in the last few days to put in signatures in support of the law.