File:Johnny Au Choi Kai's signature.png

DescriptionJohnny Au Choi Kai's signature.png 中文：Former Director-General of Buildings Department Johnny Au Choi Kai's signature Date 8 November 2018 Source

DescriptionJohnny Au Choi Kai's signature 2.png English: Former Director-General of Buildings Department Johnny Au Choi Kai's signature Date 8 November