Subject
- Boundaries23
- Administrative and political divisions10
- Society10
- Cemeteries6
- Concessions5
- Borders4
- Intelligencemilitary4
- Sino-mongolian Border4
- Transportation4
- Boundary disputes3
- Disputed Boundaries3
- Location3
- Countries2
- Economy2
- Infrastructure2
- Populated Places2
- Roads2
- Sino-mongolian Boundary Treaty2
- Airports1
- Boundary1