BEIJING — When President Trump said on Friday that there had not been “sufficient progress” toward ridding North Korea of its nuclear weapons, he made it clear that he thought China was partly to blame.

Next month, President Xi Jinping of China is expected to make his first state visit to the North — one that could see him standing beside Kim Jong-un, the country’s leader, on the reviewing stand of a military parade.

Such an image would seem to bolster Mr. Trump’s suggestion that China, angered by American tariffs on its goods, was no longer a partner in the effort to disarm the North.

But analysts in China say that is not necessarily the case — at least, not yet.

China, they say, still harbors deep suspicions about the North and Mr. Kim, despite the recent thaws in the neighbors’ off-and-on relationship. And while it is giving the North some economic help around the edges, they say, China is mostly abiding by the international sanctions meant to punish Pyongyang for its nuclear pursuits.