From Bloomberg:

A confidential United Nations report saying Chinese bullets were used in attacks on peacekeeping troops in the Darfur region of Sudan is an “attack” on China and shouldn’t be made public, a Chinese diplomat said.

Yang Tao said the allegation that Chinese ammunition was used by Darfur militias, suggesting a possible violation of the UN arms embargo on the region, was no more than a “guess” and that only “proven scientific, independent, objective views” should be included in such reports.

“It is an attack on China,” Yang said in an interview.