Abstract: An account entity relation between a target account entity and a neighbor account entity is obtained. An item entity relation between a target item entity and a neighbor item entity is obtained. The account entity relation is converted into an account relation embedding vector. The item entity relation is converted into an item relation embedding vector. Under supervision of a target item embedding vector, a target account embedding vector and a neighbor account embedding vector are fused through the account relation embedding vector into a target account representation. Under supervision of a target account embedding vector, a target item embedding vector and a neighbor item embedding vector are fused through the item relation embedding vector into a target item representation. A target item for a target account of the target account entity is determined from the target item entity based on the target account representation and the target item representation.