China vs Vietnam

China is 29 times larger than Vietnam — 9,596,960 against 331,210 km². China is 14 times more populous than Vietnam — 1,406,585,000 against 101,598,527 people.

Side by side

Population density

Vietnam is 2.1 times more densely populated than China — 307 against 147 people per km². Density is where area and population interact, and it often reverses the impression the headline figures give — a large country with a small population can feel emptier than a small crowded one by an enormous margin.

Practical differences

• Different currencies: the Chinese yuan and the Vietnamese đồng.

China

The largest country in the world using a single time zone, so the sun rises in the far west around three hours later by the clock than in Beijing. China has a land border with fourteen countries — more than any other state except Russia, which also has fourteen. Its terrain runs from Mount Everest on the Nepalese border to the Turpan Depression at 154 m below sea level.

Vietnam

Long and narrow: about 1,650 km from north to south and under 50 km wide at the waist. Hang Sơn Đoòng in Phong Nha is the largest known cave passage in the world, big enough to hold a New York block of 40-storey buildings, with its own river, jungle and clouds. Hạ Long Bay holds roughly 1,600 limestone karst islands.

Neutral facts only. Nothing here addresses politics, government, economics or which country is preferable in any respect — population is the one figure that dates, and it carries its year.