Chinese President Xi Jinping reaffirmed ties with his Russian counterpart Vladimir Putin on Tuesday, as the two face a more geopolitically assertive US government led by Donald Trump, who criticised the Kremlin's war against Ukraine on the first day of his second term as president.

Chinese President Xi Jinping and Russian President Vladimir Putin held a video call hours after President Donald Trump re-entered the White House and pledged to "deepen" their partnership.

Chinese President Xi Jinping held a meeting with Russian leader Vladimir Putin via a video link on Tuesday, state broadcaster CCTV reported. The talks came hours after US President Donald Trump returned to the White House and said he would meet Putin “very soon”.

World leaders congratulated President Donald Trump on his inauguration Monday, with many urging stronger alliances or continued cooperation between their countries and the United States, in carefully crafted social media posts and statements.

Leaders across the globe reacted to Donald Trump once again entering the White House, with some nations issuing messages of congratulations while others took issue with his inaugural comments.

President Donald Trump’s return to the White House came with upending Inauguration Day traditions, signing orders before a roaring crowd, and freewheeling banter with the press. And that was just Day One.