More than 400 kilograms of books.
I took so many books with me on the plane, so I opened a few packages to check and found that they were indeed all books.
They are all reference books.
Then take it apart, it's still the same.
For example, some FAA executive standards, some American Materials Association standards, some polytechnic university's inorganic thermodynamics data manual, etc.
Open it again and start to find other books.
A textbook from a certain university in a beautiful country, a book by someone.
After unpacking them all, the last pack contains Encyclopedia of Beautiful China, Encyclopedia of New China, Encyclopedia of Computer Science, etc.
The person who came here was not in a hurry. He sat in the examination room, ordered a cup of black tea with sugar, and quietly watched the people at the airport doing the examination.
Chapter completed!