Countries with most & least borders
Wagah Border between India and Pakistan
China and Russia share common border with as many as 14 countries. China: Afghanistan (76 km); Bhutan (470 km); India (3,380 km); Kazakhstan (1,533 km); North Korea (1,416 km); Kyrgyzstan (858 km); Laos (423 km); Mongolia (4,673 km); Myanmar (2,185 km); Nepal (1,236 km); Pakistan (523 km); Russia (3,645 km); Tajikistan (414 km); and Vietnam (1,281 km).
Russia: Azerbaijan (284 km); Belarus (959 km); China (3,645 km); Estonia (294 km); Finland (1,313 km); Georgia (723 km); Kazakhstan (6,846 km); North Korea (19 km); Latvia (217 km); Lithuania (227 km); Mongolia (3,441 km); Norway (167 km); Poland (206 km); and Ukraine (1,576 km).
Next, Brazil shares borders with ten countries while Sudan and Democratic Republic of Congo have nine.
On the other hand Sri Lanka shares only has maritime borders with the Maldives and India while Denmark has borders with Sweden and Norway by sea; Canada has sea boundaries with Denmark and France