How can Chang 'an Star exhaust air better?

Chang 'an Star drains air by opening the exhaust port, adding water such as coolant to the water tank, and closing the exhaust port after flowing out of the exhaust port. The following is an introduction about water tank cooling: 1. Matters needing attention when draining water: There is a drain plug on the lower end cover of the water tank, so you can turn off the drain plug to drain water. Note that high water temperature is easy to burn. Some cars have a tube under the wiper, which can be pulled out to exhaust air, and then water will flow out of the tube. 2. Start the water cycle: start the engine to let the water temperature rise until the radiator fan of the water tank is turned on, and then check whether the water cycle is normal. Generally, the end of the cycle can be seen from the water inlet of the water tank.