Length of the China-Russia border

Length of the China-Russia border (4,210 km)

/fact/length-of-the-china-russia-border

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Neat Ratios ...

Length of the China-Russia border (4,210 km)

is 1/5 of Circumference of Mars (21,340 km)...more
is about as big as Length of the Vic-Maui yacht race (4,270 km)...more
is about as big as Length of Chile - North-South (4,270 km)...more
is about as big as Length of the Yamal-Europe gas pipeline (4,200 km)...more
is 100 x Length of a Marathon race (42.2 km)...more

If this was a standard unit ...