China, which apps etc.?

Hello, I am 22 years old and female. I plan to travel to Shanghai, China, soon. Can you please help me with the things listed below? Which district in Shanghai is recommended for young people? What apps for navigation, food, and transportation can you use, and can you possibly change the languages ​​in these apps?…

Suitcase for travel?

Hey, I'm traveling to Shanghai at short notice in November, then I'm going to the lantern festival in Thailand and finally I'm flying to Seoul. Should I take a small carry-on bag and a large suitcase from home, or should I do something else, since it's very warm in Thailand but extremely cold in Seoul?…