If it's not an event, just a simple post, click into the reward center by tapping the avatar in the top left corner of the homepage

Fortunately, I saw a brother post this in the square and quickly claimed it. 3 dollars is enough for a large portion of pork knuckle rice, and I can even get a double portion! If you haven't claimed it, hurry up; the amount is distributed based on the number of views in the square.