《元史·列传·卷三十五》
必今日建立这门下省。 
必今日开是省。 
It is imperative to establish this subordinate province today.
<s>[INST] Translate the following Classical Chinese text into English: 必今日开是省。  [/INST] It is imperative to establish this subordinate province today.</s>
Translate the following Classical Chinese text into English: 必今日开是省。
user
It is imperative to establish this subordinate province today.
assistant