[click and watch the video] http://www.chinadaily.com.cn/a/202103/18/WS60531cd1a31024ad0bab0163.htmlHong Kong Chief Secretary for Administration Matthew Cheung Kin-chung told China Daily in an exclusive interview the enactment of national security legislation, the decision on improving the electoral system and the 14th Five-Year Plan are 'three pillars' for Hong Kong to ensure its prosperity and development.