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The move comes after US President Donald Trump wrapped up his 13-day Asia trip, where he called for more diplomatic measures to be applied to North Korea, singling out China to do more.
But observers cautioned against any expectations of an imminent solution to the nuclear crisis, saying, if anything, the visit was another step in the warming of relations between the two formerly close allies.
"Everyone's looking for a breakthrough on the impasse over the nuclear missile program and obviously that's part of the mix but ... this looks more like the main focus is on improving the Xi, Kim channel somewhat and seeing what can be done," said John Delury, associate professor at the Yonsei University Graduate School of International Studies in Seoul.
Chinese state media Xinhua reported Wednesday Song Tao, head of the International Liaison Department of the Central Committee of the Chinese Communist Party, would be visiting North Korea this week. The trip is the first time a senior Chinese official has visited North Korea this year.
Tong Zhao, a fellow at the Carnegie-Tsinghua Center for Global Policy in Beijing, said it was very likely the nuclear standoff would be on the agenda.
"(Still) even if he's going to discuss the North Korea nuclear program I don't think the position of either party, North Korea or China on this issue, would change significantly," Zhao told CNN.
"It could well be routine exchange of their long standing positions."
Delury said it would be important to see how Song was received in Pyongyang and how the visit was reported in North Korea's state media.
"If he meets Kim Jong Un, that would be a very strong message that North Korea is willing to improve the relationship with China but I would be surprised if that happens," he said.
"The way that the North Korean's report the visit, who he meets, and the tone of the reporting will tell us something about whether it was positive and some progress made, or whether it was a surly exchange."
'Catch up' time
President Xi and Kim Jong Un have not met in person, and with no top-level diplomatic visits announced between the two countries in 2017 until this point, Pyongyang and Beijing will need time to "catch up," said Delury.
"Even just at a basic level of getting a sense of where Kim Jong Un is at and what are the possibilities," said Delury. "We're in the very delicate stage and you need to get a read, you need to have lots of conversations. The Chinese channel is one of them."
Reopening diplomatic channels
While Delury said he saw Song's visit as a likely sign of improving ties between the two countries, Zhao was less sure, adding it could just be the North Koreans attempting to fend off stiffer sanctions.
"If the relationship gets worse China could very well take the very radical step to cut off oil exports to North Korea and that could mean real trouble for the regime," he said.
US President Trump celebrated his "great relationship" with President Xi on his official Twitter account Thursday, days after calling North Korean leader Kim "short and fat."
While Trump's visit to Asia in November pushed a hard line on North Korea, calling repeatedly for collective regional pressure to end the nuclear standoff, experts said there was likely no real connection between the Chinese visit and the US leader's recent Asia tour.
"China (may have) decided to postpone the visit to North Korea until the conclusion of the meeting so China knew better about what to say to North Korea regarding the nuclear program," Zhao said.
CNN's Matt Rivers and Nanlin Fang in Beijing and Sol Han in Hong Kong contributed to this article.