CCB official website can inquire about specific car washing points, log on to the homepage of CCB Credit Card, select Longka car card from the high-end products at the bottom of the page, and then click "Inquire about national car washing outlets and integral oil changing methods" on the right side of the page, select the provinces and cities where the car cards are located in the map, and select Shandong to inquire about all local car washing points. Including the business points and business hours during the Spring Festival.