US National Security Adviser Jake Sullivan, who is due to meet with China’s top diplomat Yang Jiechi in Rome on Monday, warned Beijing that it would “absolutely” face consequences if it helped Russia evade sweeping sanctions over the war in Ukraine. Sullivan told CNN the United States believed China was aware that Moscow was planning some action in Ukraine before the invasion took place, although Beijing may not have understood the full extent of what was planned. Now, he said, Washington was watching closely to see to what extent Beijing provided economic or material support to Russia, and wo…