In 2009, Sia founded Injap Land Corporation (now DoubleDragon Properties Corporation), developer of CityMall chain of malls . In 2014, DoubleDragon Properties became a public company. DoubleDragon has been developing commercial and residential properties and reportedly plans to build 100 malls by 2020. In August 2016, the company announced it was acquiring a majority stake in Hotel of Asia, Inc.