Please give some advice on traveling to Italy and France.

If these seven days include the round-trip flight time, it will be too soon.

Main attractions:

Rome: The Arc de Triomphe in Constantine (Paris was modeled after it), the Colosseum in ancient Rome, and the wishing fountain.

Florence: Cathedral of Our Lady of Flowers (the east gate of its baptismal church is regarded as the gate of heaven by Michelangelo), Michelangelo Square.

Milan: Domo Cathedral

Paris: Louvre, Versailles Palace, Eiffel Tower, Seine River (cultural area on the left bank and luxurious business area on the right bank), Place de la Concorde, Arc de Triomphe.

Suggest this arrangement: Rome (2 days)-Florence (1 day)-Milan (2 days)-Paris (2 days).

You can buy a Eurail pass, and you can take the train unlimited times in a few days after you buy it. Cost-effective.