it depends on the season.

during the spring festival, it is best to choose Guangzhou, which is warm, sparsely populated, with fresh fruits and all kinds of delicious food. It's ok now. It's too hot after June.

Go to Xi 'an in spring and autumn, but don't go in winter and summer.

You can go to two places this season. Xi 'an is the one who likes pasta and historical sites, and Guangzhou is the one who likes fruits and seafood.