On June 30, 1997, Chris Patten, the last Governor of Hong Kong, left the Government House. At 0:00:00 on July 1, 1997, the Five-star Red Flag was raised at the Hong Kong Convention and Exhibition Center. Today, on the 21st anniversary of Hong Kong's return to China, a 90-second video takes you back 21 years to see what happened before and after the return of Hong Kong.