Common history: Ukraine and Russia were once part of the Soviet Union, and the two countries have similar historical and cultural backgrounds. But after the disintegration of the Soviet Union, Ukraine chose independence, and Russia always wanted to regard it as its sphere of influence.
Crimea issue: 20 14 The Crimean Peninsula of Ukraine was annexed by Russia, which aroused widespread concern in the international community. Ukraine and western countries think this is a violation of international law, while Russia thinks it is to protect local Russians.
Pro-Russian region in the east: Since 20 14, the Donetsk and Lugansk regions in the east of Ukraine have been divided by pro-Russia and pro-Ukraine. Ukraine believes that the pro-Russian armed forces in these areas are supported by Russia, and Russia believes that these people are protecting their rights.
Energy problem: The energy problems of Ukraine and Russia have always been contradictory. Ukraine used to be an important transit country for Russian natural gas, but the dispute over price and payment between the two countries caused the supply of natural gas to be cut off many times.
Generally speaking, the historical contradiction between Ukraine and Russia is very complicated, involving territory, nationality, politics, economy and other aspects. These contradictions still exist and there are still some uncertainties in the current international situation.