According to your introduction, there should be either a big problem or a lot of problems. The loud noise of the belt is caused by serious wear and tear. The difficulty of oil leakage is that the oil seal fails after a long time, and only part of the line can be replaced. Let's go to Dong Tian Street.

Personally, I think it's better to buy H3, which is cheaper and has a certain retention rate. If I just play cross-country, I prefer the 2020 series.