27040010 under HS Code COKE AND SEMI-COKE OF COAL, OF LIGNITE OR OF PEAT, WHETHER OR NOT AGGLOMERATED; RETORT CARBON - COKE AND SEMI-COKE OF COAL, OF LIGNITE OR OF PEAT, WHETHER OR NOT AGGLOMERATED; RETORT CARBON: RETORT CARBON (GAS CARBON), 38013000 under HS Code ARTIFICIAL GRAPHITE; COLLOIDAL OR SEMI-COLLOIDAL GRAPHITE; PREPARATIONS BASED ON GRAPHITE OR OTHER CARBON IN THE FORM OF PASTES, BLOCKS, PLATES OR OTHER SEMI-MANUFACTURES CARBONACEOUS PASTES FOR ELECTRODES AND SIMILAR PASTES FOR FURNACE LININGS, and 27131100 under HS Code PETROLEUM COKE, PETROLEUM BITUMEN AND OTHER RESIDUES OF PETROLEUM OILS OR OF OILS OBTAINED FROM BITUMINOUS MINERALS - PETROLEUM COKE: NOT CALCINED were the top imported HS Codes by FEROCROM THANH HOA COMPANY LIMITED in 2021.