The sentence "Zhang Jie wrote in China after the cultural revolution ended" is a complex sentence.
Complex sentences consist of one independent (main) clause and at least one dependent (subordinate) clause. In this sentence, the independent clause is "Zhang Jie wrote in China," which can stand alone as a complete sentence. The dependent clause is "after the cultural revolution ended," which cannot stand alone as a complete sentence and relies on the independent clause for its meaning.
To determine the sentence structure, you can identify the main clause and any dependent clauses within the sentence. In this case, we have one main clause and one dependent clause, making it a complex sentence.