Fox says there was a "clear failure by the Kosovo government" to protect its rights over the Malesheva quarry.
Reciprocal measure taken after North Macedonia introduced tariffs on imports of fish and roe from Kosovo in June this year.
Serbian Prime Minister Ana Brnabic blames "chaotic political situation" in Pristina as relations deteriorate further.
Beijing sees the former Yugoslavia as a key element of its plan for greater access to European markets, but its investments in the region are a mixed blessing.
Snap elections expected after Ramush Haradinaj is summoned to the war crimes court for questioning as a suspect.