Which country has the longest combined land border?

Russia
United States
Brazil
China
China's combined land border measures 22,117 km (13,743 mi) from the mouth of the Yalu River to the Gulf of Tonkin. China borders 14 nations, more than any other country except Russia, which also borders 14.
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Answers by country

Russia
United States
Brazil
China
answers
flagSpain
35%
14%
0%
50%
14
flagRepublic of Ireland
54%
4%
0%
40%
22
flagIndia
35%
25%
0%
39%
51
flagPakistan
50%
20%
0%
30%
10
flagPoland
54%
12%
6%
26%
14139
flagUnknown
50%
15%
7%
26%
26
flagthe United Kingdom
51%
18%
2%
25%
143
flagAustria
53%
12%
9%
25%
32
flagGreece
48%
27%
0%
24%
29
flagGermany
55%
15%
4%
23%
146
flagthe Netherlands
45%
25%
10%
20%
20
flagthe United States
46%
25%
6%
19%
261
flagAustralia
66%
13%
0%
16%
30
flagIsrael
41%
33%
8%
16%
12
flagFrance
78%
0%
7%
14%
14
flagItaly
60%
26%
0%
13%
23
flagSwitzerland
64%
28%
0%
7%
14
flagCanada
68%
25%
0%
6%
16