Ruifeng s2' s water tank is on the left side of the engine room, a plastic kettle with antifreeze in it, that is, you can add antifreeze by opening the plastic cover on it. Pay attention to the fact that you can't add antifreeze immediately after driving, because the internal pressure in the cooling system is high and the engine temperature is high after driving. If the box cover is opened, the high-temperature coolant inside will be sprayed out and may be burned. Add it when the car is cold.