In fact, the reason is very simple, because coating rust inhibitor on this bolt can prevent the bolt from rusting. I believe everyone is familiar with bolt. It's just a part of our hardware store. This kind of bolt is often used in various automobile parts and industrial equipment. The bolt is made of iron products and is often the easiest to rust. This problem can be avoided if rust inhibitor is coated on this bolt. So not all Japanese products are good, but they are very serious and have very strict requirements on products, so whether they are them or not. Then I'll talk about why many domestic mechanics like to repair Japanese cars. In fact, the reason is very simple, because many bolts and nuts of Japanese cars are rusted in the manufacturing process, which makes it particularly convenient for repairmen to disassemble and maintain. On the other hand, cars made in China are different. It is often found that automobile chassis is rusted and nuts are rusted. If cars break down and need to be repaired, it is difficult for mechanics to take them apart. After all, the working hours are very expensive now, so the repairman likes it very much. This shows that Japan is very serious in doing things. They are good at learning and communication. They can always do one thing perfectly. The purpose of doing this is not their own utility, but the fundamental purpose of doing all this is to facilitate others. Just these two years, I think each of us still needs to learn from them. The reason why Japanese cars are so good is that their R&D personnel are rigorous and meticulous, which can be seen from a bolt made in Japan. Speaking of which, I'm not obsessing over foreign things, I'm just telling the truth objectively. Unlike some domestic automobile manufacturers, in order to make profits, they always shoddy some automobile parts, which has a great influence on our consumers, so I look forward to domestic automobile researchers.