What does the middle three lanes mean?

[TaylorRose]

The meaning of the middle three lanes is as follows: 1. There are three lanes in the same direction, with the leftmost lane being the overtaking lane for small vehicles, the middle lane being the driving lane for small vehicles and the overtaking lane for large vehicles, and the right lane being the driving lane. 2. The rightmost lane is the emergency lane, which can only be used in case of vehicle malfunction; otherwise, fines and penalty points may be imposed. If there are two lanes in the same direction, the left lane is the overtaking lane and the right lane is the driving lane. 3. Article 78 of the "Regulations for the Implementation of the Road Traffic Safety Law" stipulates: If there are three or more lanes in the same direction, the minimum speed of the leftmost lane is 110 kilometers per hour, and the minimum speed of the middle lane is 90 kilometers per hour. If there are two lanes in the same direction, the minimum speed of the left lane is 100 kilometers per hour.