「同床異夢」の日中韓首脳会談　経済で融和演出　北朝鮮や台湾問題では深い溝　

The ” Different Dreams on the Same Floor” Summit Meeting between China, Japan, and South Korea Staged a Fusion in the Economy; Deep Divide on North Korea and Taiwan Issues　

引用元(reference)：https://www.nishinippon.co.jp/item/n/1216174/

意味：同じ床に枕を並べて寝ながら、それぞれ違った夢を見ること。転じて、同じ事を行いながら、考えや思惑が異なること。

Meaning:　To dream differently while sleeping on the same floor with pillows side by side. In other words, to do the same thing but have different thoughts and ideas.