This repository contains a fine-tuned BART sequence-to-sequence model for Chinese text rewriting in the Classical Chinese NLP project. The exported checkpoint is based on IDEA-CCNL/Randeng-BART-139M-SUMMARY and is used by the project backend for text-to-text generation.

本仓库包含完整的 BartForConditionalGeneration 权重，可直接通过 transformers 加载。项目中主要用于现代汉语到文言风格的转换。

Model Details

Base model: IDEA-CCNL/Randeng-BART-139M-SUMMARY
Architecture: BartForConditionalGeneration
Task: text-to-text generation / modern Chinese to Classical Chinese-style rewriting
Language: Chinese
Generation defaults: beam search with num_beams=4

Intended Use

This model is intended for the Classical Chinese NLP demo backend and CLI. It is suitable for experimental text rewriting and educational demos.

The model should not be treated as a verified Classical Chinese translator for scholarly or legal use.

Usage

python

from transformers import AutoModelForSeq2SeqLM, AutoTokenizer

model_id = "liuyanliang/randeng-bart-modern-to-classical-100k-bs16"

tokenizer = AutoTokenizer.from_pretrained(model_id, use_fast=False)
model = AutoModelForSeq2SeqLM.from_pretrained(model_id)
model.eval()

text = "今文翻古：学习后按时温习，不也很快乐吗"
inputs = tokenizer(text, return_tensors="pt", truncation=True, max_length=128)
outputs = model.generate(**inputs, max_new_tokens=128, num_beams=4)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))

For this project backend:

bash

export CCNLP_SEQ2SEQ_MODEL=liuyanliang/randeng-bart-modern-to-classical-100k-bs16

PYTHONPATH=src uvicorn ccnlp.api_server:app --host 127.0.0.1 --port 8000

Prompt Format

The project uses task prefixes before the input text:

text

今文翻古：<modern Chinese input>
古文翻今：<Classical Chinese input>

For best results, use the same prefixes as the project code.

Limitations

The model may produce archaic-style text that is grammatically or historically imperfect.
Long inputs may be truncated depending on generation settings.
The model card does not include benchmark results yet.
Outputs should be reviewed before use in formal writing or research.

Files

model.safetensors: fine-tuned BART model weights
config.json: model configuration
generation_config.json: generation defaults
tokenizer files required by transformers

Framework Versions

Transformers 4.57.6