_ _ _ _ _ _ _ What makes Shanghainese proud is that _ _ _ _ _ _ they have made great achievements in the past ten years.

_ _ _ _ _ _ What makes Shanghainese proud is the subject of the whole sentence, not the copula, and _ _ _ _ They have come to many predicates of the whole sentence in the past ten years. In other words, the subject clause and predicative clause are examined here. The subject clause lacks a subject, so what to use, the predicative clause behind it does not lack any components.