WASHINGTON — The United States asserted Tuesday that Myanmar is no longer one of the world’s worst offenders on human trafficking, while removing both Myanmar and Iraq from a list of countries that use child soldiers.

In its annual report on human trafficking, the State Department also demoted China to the lowest ranking over its trafficking record, putting it in the same category as North Korea, Zimbabwe and Syria. Afghanistan and Malaysia were recognized for taking steps to curb trafficking, while Iraq was seen as making insufficient progress on that issue.

Ivanka Trump, the senior White House adviser and daughter of President Trump, said ending human trafficking was in both the moral and strategic interests of the U.S., describing the effort as a “major foreign policy priority” for the administration:

“As a mother, this is much more than a policy priority,” she said at a ceremony to unveil the report. “It is a clarion call into action in defense of the vulnerable and the exploited.”

Secretary of State Rex Tillerson said that the roughly 20 million victims of human trafficking globally illustrate how much more work must be done.

“Regrettably, our challenge is enormous,” Tillerson said. “Human trafficking is becoming more nuanced and more difficult to identify. Much of these activities are going underground, and they’re going online.”

Myanmar and Iraq were also taken off the blacklist of foreign governments identified of having child soldiers, a move that Human Rights Watch said was premature in the case of Myanmar and undermines U.S. credibility in ending the use of children in warfare. The group said the U.N. has documented child recruitment by Myanmar’s armed forces in 2016.

Also known as Burma, Myanmar was promoted for its efforts against recruitment of child soldiers and its first prosecution of government officials under a human trafficking law. The Southeast Asia nation had been demoted to the lowest tier last year.