On Sept. 15, 2021, China Customs issuferrous sulfate que contieneed a notice, in which it announced 7 mg iron in foodto fully implement “Central Return Warehouse Mode for CBEC Retail Imiron ferrous fumarate 200 mgports (hereinafter “Central ferric gluconate uptodateReturn Warehouse Mode*” for shorthow many times to take ferrous sulfate) with an immediate effect.