Where in the world?
The flag of Nepal has a unique non-rectangular shape with two stacked triangles, featuring a white moon and sun on a crimson background with a blue border.

Nepal

नेपाल

Population: 29,136,808

Region: Asia

Subregion: Southern Asia

Capital: Kathmandu

Top Level Domain: .np

Currencies: Nepalese rupee

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
The flag of India has three horizontal stripes of saffron, white, and green, with a blue Ashoka Chakra in the center of the white stripe.

India

Population: 1,380,004,385

Region: Asia

Capital: New Delhi