Xiānggǎng jīnróngyè shì jīngjì de zhòngyào zhīzhù.
Hong Kong's financial sector is a major pillar of its economy.
Tips
grammar
-业 (yè, 'industry / sector') is a productive suffix: 制造业 (manufacturing), 服务业 (service industry), 旅游业 (tourism). Attach it to any domain noun to get 'the X sector'.
