It's night-time in 1980s Riyadh, Saudi Arabia. Glittery and glamorous heels climb out of cars.
Bill Gates lifted up a vial of human feces before a crowd in Beijing recently.
The first time I heard about Portugal was in 1999, the year when it handed Macao back to China.
Editor's note: This year marks the 40th anniversary of China's reform and opening-up policy.