What are "must see" and "must do" for a family of 5 adults and 3 teenagers with 3 days in Shantou?

For 3 days in Shantou, you can visit Nan'ao Island, the Old Town, Small Park and more. Shantou Museum and University are recommended to teenagers. Also, you should not miss local delicacies in Zhujiang Road. The rental fee for a minivan is around CNY800-1,500 for different types of the vehicles.