Where in the world?
The flag of Macao has a green field with a white lotus flower above a stylized bridge and water, beneath an arc of five gold stars.

Macao

澳門

Population: 649,342

Region: Asia

Subregion: Eastern Asia

Capital: N/A

Top Level Domain: .mo

Currencies: Macanese pataca

Border countries

The flag of China has a red field with five yellow stars in the top left corner, one large star surrounded by four smaller stars in a semicircle.

China

Population: 1,402,112,000

Region: Asia

Capital: Beijing