Precautions for purchasing PC zipper suitcase from China

We need to use PC zipper suitcase from China for our daily business trips or studying abroad. Good quality PC zipper suitcase from China can be used for many years, so how to choose PC zipper suitcase from China?
Precautions for purchasing PC zipper suitcase from China:
1. Choose the right size. Different usage occasions have different size requirements for PC zipper suitcase from China. For example, if you often need to travel, it is more suitable to buy a smaller size. If you need to hold a lot of things, buy a large size.
2. Look at the appearance and style. When purchasing a PC zipper suitcase from China, you should check the appearance of the box, that is, whether the box is square and the corners of the box are symmetrical. You can put the box upright or upside down on the ground to see if the box is on the ground with all four feet and is not skewed. And check whether the surface of the box is flat, whether there are scratches or cracks, and pay special attention to the symmetry of the four corners of the box shell.
3. Choose the color of the PC zipper suitcase from China. Black is stain-resistant and easy to match with clothes; generally black and blue are more atmospheric and mature, while pink looks young.
4. Check the details of the PC zipper suitcase from China. Open the PC zipper suitcase from China and check the mouth of the box. The mouths of the boxes should match each other, the gap should be small, the seams should be closed, the hinges can rotate flexibly, there is no jamming, and the buckle has no faults. The handle is installed firmly and cannot be loose. The tie rod should be flexible and have a certain strength. After the locking button of the pull rod is pressed, the pull rod should be able to expand and contract smoothly. The wheels should rotate flexibly, and it is best to choose wheels with bearings. When checking the box lock, you can combine several groups of numbers at will for testing, and the opening and closing can be normal.