Three Chinese students, Zhang Lin, Zhao Qiang, and Li Shan, and three foreign students, John, Jessie, and Anna, went on a summer vacation  The optional tourist destinations are Xi'an, Hangzhou, Dalian and Zhangjiajie
Already know: (1) each person can only go to one place; (2) wherever there are Chinese students, there must be foreign students; (3) wherever there are foreign students, there must be Chinese students; (4) John went to Xi'an or Hangzhou, and Zhao Qiang went to Zhangjiajie
Anna goes to Zhangjiajie.