What are the 40,000 km maintenance items in the modern famous maintenance manual?

According to the maintenance manual, 40,000 km maintenance needs to replace the oil filter and spark plug, the whole vehicle needs to be inspected, and all kinds of oil and water need to be replaced. But it still depends on your own car condition and demand. You don't need to replace them all. Personally, I think you changed the spark plug and brake oil from the beginning. The oil used is German GT, and the third filter element is man brand, which is very durable. It would be wasted if it was changed.