SHENZHEN—Hong Kong’s national security legislation will not punish people retroactively, a senior Chinese official said on Monday, touching on a key question raised by local residents, diplomats, and foreign investors over the controversial law.
Howver, Deng Zhonghua, deputy director of the Hong Kong and Macau Affairs Officealso said that while the financial hub should be responsible for most enforcement work, Beijing must be able to have jurisdiction over the most serious national security cases.





