PDF containing Chinese cannot be loaded

[ren-dao]

Hello dear author, when I put in the English PDF everything works fine, but when I put in the Chinese PDF the Chroma database cannot be updated, if you can teach me, I will be grateful!

When Put in Chinese PDF：
Number of existing documents in DB: 0
✅ No new documents to add

When Put in English PDF：
Number of existing documents in DB: 0
👉 Adding new documents: 7