《新唐书·列传·卷一百二十一》
游览过北山东皋，著书时自己署名为东皋子。
游北山东皋，著书自号东皋子。
After traveling in the eastern mountains of the north, he signed his works as Dong Ga Zi.
<s>[INST] Provide a modern Chinese interpretation of the following Classical Chinese passage: 游北山东皋，著书自号东皋子。 [/INST] 游览过北山东皋，著书时自己署名为东皋子。</s>
Provide a modern Chinese interpretation of the following Classical Chinese passage: 游北山东皋，著书自号东皋子。
user
游览过北山东皋，著书时自己署名为东皋子。
assistant