Shànglián hé xiàlián dōu xiěhǎo le, kě tā xiǎng le bàntiān yě xiǎngbuchū yí ge hǎo héngpī.
Both lines of the couplet were done, but however long he thought, he couldn't come up with a good horizontal scroll.
Tips
culture
A door couplet (春联) has three parts: the 上联 (first line) on the right as you face the door, the 下联 (second line) on the left, and the 横批 across the top. The 横批 is usually four characters that sum up the wish, such as 万事如意 or 五谷丰登.