China

Area:  
9,630,960 km2

Population:  
1,3 billion

Neighbours and lenght of borders (km):  
North Korea (1,416) - Russia (3,645) - Mongolia (4,677) - Kazakhstan (1,533) - Kyrgyzstan (858) -Tajikistan (414) - Afghanistan (76) - Pakistan (523) - India (3,380) - Nepal (1,236) - Bhutan (470) - Myanmar (2,185) - Laos (423) - Vietnam (1,281)