Chita @ 6080km

Chita, Zabaykalsky Krai @ 6080km

City of 300k with a rich history:

Pyotr Beketov's Cossacks founded Chita in 1653.[2][9]

After 1825, several of the Decembrists suffered exile to Chita.[8]

When Richard Maack visited the city in 1855, he saw a wooden town, with one, also wooden, church. He estimated Chita's population at under 1,000, but predicted that the city would soon experience fast growth, due to the upcoming annexation of the Amur valley by Russia.[11]

In 1945, Puyi, the last Emperor of China, and some of his associates were held prisoner in the city, in a former sanatorium for officers.[12]

https://en.wikipedia.org/wiki/Chita,_Zabaykalsky_Krai