Complex sentence refers to a sentence composed of two or more clauses whose meanings are related and do not contain each other in structure.
According to the above definition, which of the following is not a complex sentence?
Ye Wen practises martial arts in his youth, sells martial arts in his youth, teaches martial arts in his middle age, and takes care of his old age. In addition, he also opened a hotel and concurrently engaged in health care and physiotherapy for hands and feet.