I heard that part (chopper parts were there), but also heard the PRC made their Embassy available as an Ops Center either for the Serbian secret police or similar unit.
Since the Embassy is legally China, that would mean some of the most robust Serb ops were being done from China.
I have nothing against Serbia, now or then.
The JDAM that hit the Embassy was GPS-guided —it’s IMPOSSIBLE that the bomb was not intended for that target.
IIRC, at the time the US excuse was that the building had previously had other uses and somehow the word that it was now an embassy had not gotten to the right people.