Do I need to unpack my checked baggage during the security check at Pudong Airport? ?

You will never open the box for inspection at Pudong Airport unless you pack dangerous goods, drugs and the like. Checked luggage seems to be unpacked only when you go to the evil United States (but many boxes are not used in the United States, as long as you don't scribble on I-94). If you go to America, you can ask me more questions. If you want to go to the United States, you must have I20, which means that you are a student and you can enjoy the weight of checked baggage. It seems that in other countries, just put the admission notice there! You must prove your legal student status! And your student status will also be indicated on the visa! Don't be too heavy. Generally, each piece is controlled at 20 kilograms. I brought a small bag at random (10 kg or so). Nobody cares. Hehe, but I seldom bring 1 box under 8 kg at a time, so I haven't had any trouble! Finally, I wish you a pleasant journey!