I will give you my list. My trip is a week. You can see how long your time is, and you can increase or decrease it according to your own time. Do you think this is enough?

35-liter backpack and one disposable underwear (10 package. ); Toothbrush (I hate it in hotels); Socks; 3 laundry bags; T-shirt with short sleeves, 1 sports shorts (can be worn as pajamas or at night) and a can of tiger balm; Axe marks drive wind oil (universal, or diarrhea in one bite); Norfloxacin 1 plate; Comb; A small set of travel cosmetics (facial cleanser, toner, moisturizer). Because it's a plane, I didn't bring shower gel and shampoo. If you buy it locally, you can buy a sample. Of course, the hotel also has it. I don't like to use hotel things. Tea (I love tea) and a book. MP3, put on your favorite songs; Camera; Post n times; A pen; Charger; Go out alone to ask small backpack. Sun hat, sunglasses, sunscreen, bank card, cash (not too much) ID card, paper towel with 3 packs, you can buy it locally. Because you have been to Suzhou, I suggest you buy a book about gardens, which is more interesting to read.

In addition, according to personal hobbies, bring your accustomed objects, and lighters and knives are not allowed on the plane.