If you have a CCB car card, you can check your local car wash points online.

when you log on to CCB's credit card website and select "high-end products" in the page, you will click on the car card with the "auto" logo on the black card face on the far right, and the CCB's car card page will pop up. Then you select "national car wash outlets and integral oil change method query" on the upper right, and a page will pop up. Then you choose your province and city, and after the page pops up, you can click on the car wash outlets to query. I just visited this website, and by the way, I cut a picture of the car wash point in Bishan area for you to have a look, but personally I suggest you go to their website, and maybe other car wash points are convenient for you.