if you travel, it depends on what style you like. Hangzhou's landscape is soft and traditional, Chongqing is bustling and lively, there are many scenic spots in online celebrity, Chengdu is relaxing and comfortable, and Xi 'an is an ancient capital. In addition, it depends on how much time you have, so you can choose some places with many surrounding radiation attractions, such as Emei, Leshan, Dujiangyan and Jiuzhaigou near Chengdu.

When it comes to snacks, the restaurants in different places have their own characteristics, especially the places you mentioned have obvious styles, so it's up to your taste preference. Hangzhou is light, Chengdu and Chongqing taste spicy and delicious, and Xi 'an is rough and solid (Chinese hamburger+cold skin set meal, staple food is accompanied by staple food). I suggest you search for delicious food from all over the world, and then compare it yourself before making up your mind.

personally, as long as you have time, all these places are worth visiting. Just walk down one by one, and the important thing is to start now ~