China's Foreign Minister Wang Yi and the U.S. Secretary of State Antony Blinken held a phone call Tuesday just hours after Russian President Vladimir Putin ordered troops into two separate parts of Ukraine.

According to a foreign ministry statement, the situation in Ukraine is getting worse and that the Chinese side called for restraint.

The Secretary underscored the need to preserve Ukraine's sovereignty and territorial integrity, according to a brief statement from the U.S. State Department.

Ahead of the Winter Olympic Games in Beijing, Russian President Putin and Chinese President Xi Jinping met.

Evelyn Cheng.

The latest developments in the Russia-Ukraine crisis show that the invasion of Ukraine has begun, according to a British government official.

U.K. Health Minister Sajid Javid told Sky News that Europe was waking up to a very dark day. We have always said that is completely unacceptable.

Russian President Vladimir Putin ordered troops into eastern Ukraine on Monday after announcing that the Kremlin would officially recognize the self-declared republics as independent from Ukraine.

I think we can tell from the reports that he was sent in tanks and troops. You can conclude from that that the invasion of Ukraine has begun.

The Biden administration has yet to refer to the Russian incursion as an invasion. Michael McFaul, the former U.S. ambassador to Russia, told CNBC on Monday that Putin had invaded Ukraine.

European ambassadors are gathering. The EU's next steps need to be discussed.

The presidents of the European Commission and European Council said Monday that Russia's recognition of the areas of eastern Ukraine as independent was a violation of international law.

The two presidents said that the Union would respond with sanctions against those involved in the illegal act.

The EU's foreign affairs chief is expected to call for an extraordinary meeting of foreign affairs ministers on Tuesday to approve new sanctions on Russia.

The package of measures need the approval of all 27 member states.

European Commission President Ursula von der Leyen told CNBC that "everything is on the table" when it comes to sanctions against Russia.

The person is Silvia Amaro.

Despite growing tensions between the Ukrainian army and pro-Russia rebels, people visit the Motherland Monument.

Anadolu Agency.

Rob Lee of the Foreign Policy Research Institute said that Russia doesn't want NATO to believe that arms exports to Ukraine deterred Moscow.

Lee, a senior fellow at the institute, said that Putin may think it's better for Russia to ramp up aggression on Ukraine.

NATO will think that arms exports to Ukraine were a key decisive step, and that more deterrence is needed, if Russia backs down now, he told CNBC on Monday.

One reason why Russia might consider action now to be less costly than waiting is that if Ukraine develops longer-range missile systems that could lead to strikes on Russian cities or military infrastructure deeper into Russia.

The cost-benefit analysis for Putin is probably part of the option that Ukraine doesn't have.

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Ukrainian President Volodymyr Zelenskyy said that his government won't react to provocation from Russia and won't give anything to anyone.

According to a transcript by NBC News, he said in a televised broadcast early Tuesday morning that his government is committed to diplomacy.

We are dedicated to diplomatic means of resolving this issue. He said that they were not reacting to any provocations after Putin ordered forces into eastern Ukraine. We are on the land. We are not afraid of anyone.

Zelenskyy called on allies to support Kyiv.

He said that they need to see who their friends and partners are.

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The crisis between Russia and Ukraine took a turn for the worse as oil prices jumped. Last year, Russia was the largest supplier of natural gas and oil to the European Union.

Lipow said that oil could go to $110 per barrel if the crisis worsened.

If Russian oil supplies are cut off, we could see oil prices rise another $10 to $15 a barrel, putting the price of oil at about $110 a barrel.

There is a person named Weizhen Tan.