How often and how should JAC Ruifeng antifreeze be changed?

Jianghuai Ruifeng antifreeze is changed once every two years or 40,000 kilometers. The antifreeze used in Ruifeng engine has the following protective functions: First, it plays an anti-corrosion protection role for the components of the cooling system. Second, prevent scaling and reduce the heat dissipation effect of the radiator. Third, ensure that the engine can work in the normal temperature range. Replacement method of Ruifeng antifreeze: 1. Tighten the water tank cover, open the water tank drain valve and release the antifreeze. 2. Insert the rubber hose connected with the water pipe into the water inlet of the water tank, turn on the tap water, and make the tap water continuously flow through the engine cooling system. During the flushing operation, let the engine run at idle speed and keep the above operation until the water tank releases clear water. 3. Turn off the tap water, and then turn off the drain valve of the water tank after the water in the cooling system is discharged. 4. Add antifreeze from the water inlet of the water tank, and add antifreeze to the water tank. Unscrew the cover of the liquid storage tank, add antifreeze, and reach the "Max" scale line, and be careful not to exceed the "Max" scale line. 5. Cover the water tank cover and the liquid storage tank cover and tighten them. 6, start the engine, idle running for 2~3 min, unscrew the water tank cover. At this time, because some air is excluded, the cooling system will reduce the level of antifreeze. At this time, antifreeze should be supplemented to make antifreeze reach the "Max" scale. 7. Cover the water tank.