I finished my Air China Gold promotion on the 30th of March and according to the terms and conditions i had to keep my account on miles until the promotion was completed.

The problem was that i had another stay on the 2nd of April and since i won't use Air China in the future, i wanted to accumulate points for the stay. Being afraid that if i changed my earning preferences to points before the first stay was posted, i would get points for it too, i kept the miles option until i completed both stays.

As soon as my first stay was posted on my account (and before the second stay was posted), i changed my preference to points and got points for the second stay. I called the MR line to make sure they give me points and not miles and they confirmed that you get what you have as your earnings preference at the time the stay is processed and posts on your account