Not only USA but also Germany has checked the Heparin imported from China, from The New York Times:
The German authorities said Friday that they had asked all German producers of the blood thinner heparin to check whether their ingredients came from China, after allergic reactions to the drug there were linked to two Chinese suppliers.
In cases where China did supply the raw ingredient, manufacturers were asked to test for any irregularities. The German authorities recalled the suspect heparin on Wednesday after receiving reports of allergic reactions in about 80 patients.
Heparin manufactured with Chinese ingredients has been linked to 19 deaths in the United States. Federal drug regulators there said sophisticated tests had found what might be a counterfeit ingredient in the heparin associated with the deaths and serious allergic reactions in more than 700 patients.
Read also AFP’s report: US says contaminated blood-thinner came from China