According to Baidu's query, the water tank is the place where antifreeze is added, and the water tank is in the engine compartment. Antifreeze can prevent the coolant from freezing, cracking the radiator and freezing the engine block when parking in cold winter, which is the full name of antifreeze coolant. Generally, the antifreeze is -30 to -35 degrees, and the freezing point after mixing with water should be at least-10 to-15.