Aim at the door frame, not higher than the door frame. The doorframe is the sky, not higher than the sky.
The height of couplets is related to the size of door frames. Generally speaking, when pasting Spring Festival couplets, the couplets are pasted down against the upper doorframe, that is, aligned with the upper doorframe. If you paste the word "Fu" in the middle, it is generally located in the middle of the door, which is about two-thirds of the height of the door. If the door is pasted, the position will be higher.
Pay attention to posting couplets.
Posting couplets must be completed before noon, first pasting, couplets, the day after tomorrow, and finally cross-approving. Generally speaking, the last word of the first couplet is "wrong sound" and the last word of the second couplet is "flat sound". When posting Spring Festival couplets, people are facing the door, with Spring Festival couplets posted on their right hand and Spring Festival couplets posted on their left hand. Don't post it backwards. In addition, you can't post couplets for three years when you have something at home, but it is still possible to post a blessing and hang a lantern.