The United States will not send high-level officials to attend China’s second Belt and Road summit in Beijing this month, a U.S. State Department spokesman said on Tuesday, citing concerns about financing practices for the initiative, reports Reuters.

China’s top diplomat, Yang Jiechi, said on Saturday that almost 40 foreign leaders would take part in the summit due to be held in Beijing in late April.

The first summit for Belt and Road was held in 2017 and attended by Matt Pottinger, the senior White House official for Asia.

There are no such plans this year.

“We will not send high-level officials from the United States,” U.S. State Department spokesman Robert Palladino said in answer to a question from Reuters.

“We will continue to raise concerns about opaque financing practices, poor governance, and disregard for internationally accepted norms and standards, which undermine many of the standards and principles that we rely upon to promote sustainable, inclusive development, and to maintain stability and a rules-based order. We have repeatedly called on China to address these concerns,” Palladino added.

A person familiar with the matter said Washington was considering sending a lower-level staffer from the U.S. embassy to observe and take notes on the conference but not to participate, though a final decision has not yet been made.