Zhang Wei 想要建立自己的销售线索挖掘目标客户，但不知道从何处入手。哪些建议有用？请选择所有适用选项。

To effectively generate leads, Zhang Wei should leverage LinkedIn's targeting capabilities. Using "Contact and account targeting" allows him to upload existing lists of contacts or companies, enabling LinkedIn to match these with user profiles and company pages. This is highly effective for reaching specific, known prospects. Additionally, "Exclude existing customers" is crucial to avoid wasting ad spend on individuals who have already converted. This refines the audience, focusing efforts on new potential leads. "Start by narrowing down the target audience" is a good general principle but less specific and actionable than the other two options in the context of LinkedIn's practical tools.