ZH 
EN 
Some drivers change lanes and overtake at every opportunity, cutting in wherever there is room. It unsettles other drivers and can start arguments. In three situations, though, it is not just rude but illegal.
1. Changing lanes across a solid line
Road markings are either solid or broken. You may change lanes where the line is broken, provided you do not impede others, but not across a solid line: it is a line you are not meant to cross. Driving against a prohibition sign or marking carries a fine of up to 200 yuan and three points, so pay attention.
2. Changing lanes without signalling
Some drivers rely on watching behind and to the side and skip the indicator, worried that signalling will only encourage others to close the gap. Surprising other traffic is dangerous: the vehicles around you cannot know your intention, which raises the risk. Signal before changing lanes; failing to do so is an offence and carries a fine.
3. Changing several lanes at once
Before changing lanes, observe the traffic behind, to the side and in the lane you are entering. Once you are sure it is safe, signal, check the mirrors for vehicles overtaking, and move smoothly into the lane without impeding anyone, then cancel the indicator.
Move only into the adjacent lane. If you need to go further, enter the adjacent lane first, drive on for a distance, then change again. Changing several lanes in one movement is illegal.
