Complex sentence: As of 12 July 2012, a $500 million facelift for Terminal 1 has been completed, completing the terminal's largest renovation to date, involving works on its facade and halls under a theme called "Tropical City".
Split into simpler sentences: As of 12 July 2012, a $500 million facelift for Terminal 1 has completed. It will be the terminals' biggest overhaul to date, involving works on its facade and halls under a theme called "Tropical City".