Why is Bhutan not part of China?

Related questions

1. Was China ever a part of India?
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3. Can altitude kill you?
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5. Is it harder to sleep in high altitude?
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8. What height is altitude sickness?
9. When should you worry about altitude sickness?
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Tags

1. #china
2. #contiguous
3. #people
4. #kingdom
5. #territorial
6. #tense
7. #border
8. #kilometres
9. #republic
10. #shares
11. #potential
12. #diplomatic
13. #disputes
14. #historically
15. #conflict
16. #relations
17. #bhutan
18. #official
19. #maintain
20. #source